Home / 21,243.13-31,864.16-5,660.71

Finding the Fourth Proportional to 21,243.13, 31,864.16 and 5,660.71

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Solution

The fourth proportional to 21,243.13, 31,864.16 and 5,660.71 is: 8,490.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243.13 : 31,864.16 = 5,660.71 : x
  2. Step 2: Convert to fraction form
    21,243.13/31,864.16 = 5,660.71/x
  3. Step 3: Cross multiply
    21,243.13x = 31,864.16 × 5,660.71
  4. Step 4: Simplify right side
    21,243.13x = 180,373,740.85
  5. Step 5: Solve for x
    x = 180,373,740.85/21,243.13
  6. Step 6: Final answer
    x = 8,490.92

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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.