Home / 21,336.80-29,437.74-13,787.57

Finding the Fourth Proportional to 21,336.80, 29,437.74 and 13,787.57

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Solution

The fourth proportional to 21,336.80, 29,437.74 and 13,787.57 is: 19,022.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.80 : 29,437.74 = 13,787.57 : x
  2. Step 2: Convert to fraction form
    21,336.80/29,437.74 = 13,787.57/x
  3. Step 3: Cross multiply
    21,336.80x = 29,437.74 × 13,787.57
  4. Step 4: Simplify right side
    21,336.80x = 405,874,753.70
  5. Step 5: Solve for x
    x = 405,874,753.70/21,336.80
  6. Step 6: Final answer
    x = 19,022.29

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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.