Home / 21,128.13-29,134.15-17,807.54

Finding the Fourth Proportional to 21,128.13, 29,134.15 and 17,807.54

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Solution

The fourth proportional to 21,128.13, 29,134.15 and 17,807.54 is: 24,555.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.13 : 29,134.15 = 17,807.54 : x
  2. Step 2: Convert to fraction form
    21,128.13/29,134.15 = 17,807.54/x
  3. Step 3: Cross multiply
    21,128.13x = 29,134.15 × 17,807.54
  4. Step 4: Simplify right side
    21,128.13x = 518,807,351.30
  5. Step 5: Solve for x
    x = 518,807,351.30/21,128.13
  6. Step 6: Final answer
    x = 24,555.29

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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.