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Finding the Fourth Proportional to 13,397.85, 18,489.08 and 7,430.07

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Solution

The fourth proportional to 13,397.85, 18,489.08 and 7,430.07 is: 10,253.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,397.85 : 18,489.08 = 7,430.07 : x
  2. Step 2: Convert to fraction form
    13,397.85/18,489.08 = 7,430.07/x
  3. Step 3: Cross multiply
    13,397.85x = 18,489.08 × 7,430.07
  4. Step 4: Simplify right side
    13,397.85x = 137,375,177.21
  5. Step 5: Solve for x
    x = 137,375,177.21/13,397.85
  6. Step 6: Final answer
    x = 10,253.52

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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.