Home / 15,720.48-21,694.23-8,646.89

Finding the Fourth Proportional to 15,720.48, 21,694.23 and 8,646.89

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Solution

The fourth proportional to 15,720.48, 21,694.23 and 8,646.89 is: 11,932.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.48 : 21,694.23 = 8,646.89 : x
  2. Step 2: Convert to fraction form
    15,720.48/21,694.23 = 8,646.89/x
  3. Step 3: Cross multiply
    15,720.48x = 21,694.23 × 8,646.89
  4. Step 4: Simplify right side
    15,720.48x = 187,587,511.97
  5. Step 5: Solve for x
    x = 187,587,511.97/15,720.48
  6. Step 6: Final answer
    x = 11,932.68

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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.