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Finding the Fourth Proportional to 13,154.79, 18,151.18 and 7,489.20

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Solution

The fourth proportional to 13,154.79, 18,151.18 and 7,489.20 is: 10,333.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,154.79 : 18,151.18 = 7,489.20 : x
  2. Step 2: Convert to fraction form
    13,154.79/18,151.18 = 7,489.20/x
  3. Step 3: Cross multiply
    13,154.79x = 18,151.18 × 7,489.20
  4. Step 4: Simplify right side
    13,154.79x = 135,937,817.26
  5. Step 5: Solve for x
    x = 135,937,817.26/13,154.79
  6. Step 6: Final answer
    x = 10,333.71

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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.