Home / 21,117.29-29,141.42-11,685.87

Finding the Fourth Proportional to 21,117.29, 29,141.42 and 11,685.87

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Solution

The fourth proportional to 21,117.29, 29,141.42 and 11,685.87 is: 16,126.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.29 : 29,141.42 = 11,685.87 : x
  2. Step 2: Convert to fraction form
    21,117.29/29,141.42 = 11,685.87/x
  3. Step 3: Cross multiply
    21,117.29x = 29,141.42 × 11,685.87
  4. Step 4: Simplify right side
    21,117.29x = 340,542,787.31
  5. Step 5: Solve for x
    x = 340,542,787.31/21,117.29
  6. Step 6: Final answer
    x = 16,126.26

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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.