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Finding the Fourth Proportional to 8,784.70, 12,117.32 and 6,131.14

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Solution

The fourth proportional to 8,784.70, 12,117.32 and 6,131.14 is: 8,457.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,784.70 : 12,117.32 = 6,131.14 : x
  2. Step 2: Convert to fraction form
    8,784.70/12,117.32 = 6,131.14/x
  3. Step 3: Cross multiply
    8,784.70x = 12,117.32 × 6,131.14
  4. Step 4: Simplify right side
    8,784.70x = 74,292,985.34
  5. Step 5: Solve for x
    x = 74,292,985.34/8,784.70
  6. Step 6: Final answer
    x = 8,457.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.