Home / 15,799.92-21,787.56-13,569.20

Finding the Fourth Proportional to 15,799.92, 21,787.56 and 13,569.20

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Solution

The fourth proportional to 15,799.92, 21,787.56 and 13,569.20 is: 18,711.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,799.92 : 21,787.56 = 13,569.20 : x
  2. Step 2: Convert to fraction form
    15,799.92/21,787.56 = 13,569.20/x
  3. Step 3: Cross multiply
    15,799.92x = 21,787.56 × 13,569.20
  4. Step 4: Simplify right side
    15,799.92x = 295,639,759.15
  5. Step 5: Solve for x
    x = 295,639,759.15/15,799.92
  6. Step 6: Final answer
    x = 18,711.47

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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.