Home / 15,713.06-21,684.13-8,639.74

Finding the Fourth Proportional to 15,713.06, 21,684.13 and 8,639.74

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Solution

The fourth proportional to 15,713.06, 21,684.13 and 8,639.74 is: 11,922.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.06 : 21,684.13 = 8,639.74 : x
  2. Step 2: Convert to fraction form
    15,713.06/21,684.13 = 8,639.74/x
  3. Step 3: Cross multiply
    15,713.06x = 21,684.13 × 8,639.74
  4. Step 4: Simplify right side
    15,713.06x = 187,345,169.52
  5. Step 5: Solve for x
    x = 187,345,169.52/15,713.06
  6. Step 6: Final answer
    x = 11,922.89

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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.