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Finding the Fourth Proportional to 8,691,809.70, 13,037,714.55 and 5,479,544.10

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Solution

The fourth proportional to 8,691,809.70, 13,037,714.55 and 5,479,544.10 is: 8,219,316.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691,809.70 : 13,037,714.55 = 5,479,544.10 : x
  2. Step 2: Convert to fraction form
    8,691,809.70/13,037,714.55 = 5,479,544.10/x
  3. Step 3: Cross multiply
    8,691,809.70x = 13,037,714.55 × 5,479,544.10
  4. Step 4: Simplify right side
    8,691,809.70x = 71,440,731,839,936.66
  5. Step 5: Solve for x
    x = 71,440,731,839,936.66/8,691,809.70
  6. Step 6: Final answer
    x = 8,219,316.15

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.