Home / 15,724.28-21,699.35-8,650.71

Finding the Fourth Proportional to 15,724.28, 21,699.35 and 8,650.71

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Solution

The fourth proportional to 15,724.28, 21,699.35 and 8,650.71 is: 11,937.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.28 : 21,699.35 = 8,650.71 : x
  2. Step 2: Convert to fraction form
    15,724.28/21,699.35 = 8,650.71/x
  3. Step 3: Cross multiply
    15,724.28x = 21,699.35 × 8,650.71
  4. Step 4: Simplify right side
    15,724.28x = 187,714,784.04
  5. Step 5: Solve for x
    x = 187,714,784.04/15,724.28
  6. Step 6: Final answer
    x = 11,937.89

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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.