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Finding the Fourth Proportional to 13,759.92, 18,988.65 and 7,472.25

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Solution

The fourth proportional to 13,759.92, 18,988.65 and 7,472.25 is: 10,311.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.92 : 18,988.65 = 7,472.25 : x
  2. Step 2: Convert to fraction form
    13,759.92/18,988.65 = 7,472.25/x
  3. Step 3: Cross multiply
    13,759.92x = 18,988.65 × 7,472.25
  4. Step 4: Simplify right side
    13,759.92x = 141,887,939.96
  5. Step 5: Solve for x
    x = 141,887,939.96/13,759.92
  6. Step 6: Final answer
    x = 10,311.68

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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.