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Finding the Fourth Proportional to 12,821.70, 19,232.55 and 8,885.10

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Solution

The fourth proportional to 12,821.70, 19,232.55 and 8,885.10 is: 13,327.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.70 : 19,232.55 = 8,885.10 : x
  2. Step 2: Convert to fraction form
    12,821.70/19,232.55 = 8,885.10/x
  3. Step 3: Cross multiply
    12,821.70x = 19,232.55 × 8,885.10
  4. Step 4: Simplify right side
    12,821.70x = 170,883,130.01
  5. Step 5: Solve for x
    x = 170,883,130.01/12,821.70
  6. Step 6: Final answer
    x = 13,327.65

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Half scale
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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.