Home / 15,724.41-21,699.65-8,650.79

Finding the Fourth Proportional to 15,724.41, 21,699.65 and 8,650.79

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Solution

The fourth proportional to 15,724.41, 21,699.65 and 8,650.79 is: 11,938.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.41 : 21,699.65 = 8,650.79 : x
  2. Step 2: Convert to fraction form
    15,724.41/21,699.65 = 8,650.79/x
  3. Step 3: Cross multiply
    15,724.41x = 21,699.65 × 8,650.79
  4. Step 4: Simplify right side
    15,724.41x = 187,718,963.47
  5. Step 5: Solve for x
    x = 187,718,963.47/15,724.41
  6. Step 6: Final answer
    x = 11,938.06

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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.