Home / 21,332.55-29,430.50-13,371.87

Finding the Fourth Proportional to 21,332.55, 29,430.50 and 13,371.87

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Solution

The fourth proportional to 21,332.55, 29,430.50 and 13,371.87 is: 18,447.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,332.55 : 29,430.50 = 13,371.87 : x
  2. Step 2: Convert to fraction form
    21,332.55/29,430.50 = 13,371.87/x
  3. Step 3: Cross multiply
    21,332.55x = 29,430.50 × 13,371.87
  4. Step 4: Simplify right side
    21,332.55x = 393,540,820.04
  5. Step 5: Solve for x
    x = 393,540,820.04/21,332.55
  6. Step 6: Final answer
    x = 18,447.90

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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.