Home / 15,720.39-21,694.74-8,646.66

Finding the Fourth Proportional to 15,720.39, 21,694.74 and 8,646.66

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Solution

The fourth proportional to 15,720.39, 21,694.74 and 8,646.66 is: 11,932.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.39 : 21,694.74 = 8,646.66 : x
  2. Step 2: Convert to fraction form
    15,720.39/21,694.74 = 8,646.66/x
  3. Step 3: Cross multiply
    15,720.39x = 21,694.74 × 8,646.66
  4. Step 4: Simplify right side
    15,720.39x = 187,587,040.57
  5. Step 5: Solve for x
    x = 187,587,040.57/15,720.39
  6. Step 6: Final answer
    x = 11,932.72

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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.