Home / 15,713.56-21,685.50-8,640.92

Finding the Fourth Proportional to 15,713.56, 21,685.50 and 8,640.92

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Solution

The fourth proportional to 15,713.56, 21,685.50 and 8,640.92 is: 11,924.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.56 : 21,685.50 = 8,640.92 : x
  2. Step 2: Convert to fraction form
    15,713.56/21,685.50 = 8,640.92/x
  3. Step 3: Cross multiply
    15,713.56x = 21,685.50 × 8,640.92
  4. Step 4: Simplify right side
    15,713.56x = 187,382,670.66
  5. Step 5: Solve for x
    x = 187,382,670.66/15,713.56
  6. Step 6: Final answer
    x = 11,924.90

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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.