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Finding the Fourth Proportional to 13,114.16, 18,081.12 and 8,915.12

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Solution

The fourth proportional to 13,114.16, 18,081.12 and 8,915.12 is: 12,291.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,114.16 : 18,081.12 = 8,915.12 : x
  2. Step 2: Convert to fraction form
    13,114.16/18,081.12 = 8,915.12/x
  3. Step 3: Cross multiply
    13,114.16x = 18,081.12 × 8,915.12
  4. Step 4: Simplify right side
    13,114.16x = 161,195,354.53
  5. Step 5: Solve for x
    x = 161,195,354.53/13,114.16
  6. Step 6: Final answer
    x = 12,291.70

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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.