Home / 20,688.81-31,008.91-9,572.02

Finding the Fourth Proportional to 20,688.81, 31,008.91 and 9,572.02

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Solution

The fourth proportional to 20,688.81, 31,008.91 and 9,572.02 is: 14,346.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.81 : 31,008.91 = 9,572.02 : x
  2. Step 2: Convert to fraction form
    20,688.81/31,008.91 = 9,572.02/x
  3. Step 3: Cross multiply
    20,688.81x = 31,008.91 × 9,572.02
  4. Step 4: Simplify right side
    20,688.81x = 296,817,805.25
  5. Step 5: Solve for x
    x = 296,817,805.25/20,688.81
  6. Step 6: Final answer
    x = 14,346.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.