Home / 20,816.13-28,726.28-11,384.71

Finding the Fourth Proportional to 20,816.13, 28,726.28 and 11,384.71

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Solution

The fourth proportional to 20,816.13, 28,726.28 and 11,384.71 is: 15,710.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.13 : 28,726.28 = 11,384.71 : x
  2. Step 2: Convert to fraction form
    20,816.13/28,726.28 = 11,384.71/x
  3. Step 3: Cross multiply
    20,816.13x = 28,726.28 × 11,384.71
  4. Step 4: Simplify right side
    20,816.13x = 327,040,310.26
  5. Step 5: Solve for x
    x = 327,040,310.26/20,816.13
  6. Step 6: Final answer
    x = 15,710.91

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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.