Home / 15,787.12-21,785.97-8,713.57

Finding the Fourth Proportional to 15,787.12, 21,785.97 and 8,713.57

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Solution

The fourth proportional to 15,787.12, 21,785.97 and 8,713.57 is: 12,024.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,787.12 : 21,785.97 = 8,713.57 : x
  2. Step 2: Convert to fraction form
    15,787.12/21,785.97 = 8,713.57/x
  3. Step 3: Cross multiply
    15,787.12x = 21,785.97 × 8,713.57
  4. Step 4: Simplify right side
    15,787.12x = 189,833,574.61
  5. Step 5: Solve for x
    x = 189,833,574.61/15,787.12
  6. Step 6: Final answer
    x = 12,024.59

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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.