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Finding the Fourth Proportional to 15,830.52, 21,845.25 and 8,659.02

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Solution

The fourth proportional to 15,830.52, 21,845.25 and 8,659.02 is: 11,948.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,830.52 : 21,845.25 = 8,659.02 : x
  2. Step 2: Convert to fraction form
    15,830.52/21,845.25 = 8,659.02/x
  3. Step 3: Cross multiply
    15,830.52x = 21,845.25 × 8,659.02
  4. Step 4: Simplify right side
    15,830.52x = 189,158,456.66
  5. Step 5: Solve for x
    x = 189,158,456.66/15,830.52
  6. Step 6: Final answer
    x = 11,948.97

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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.