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Finding the Fourth Proportional to 15,659.52, 21,610.55 and 8,947.31

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Solution

The fourth proportional to 15,659.52, 21,610.55 and 8,947.31 is: 12,347.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.52 : 21,610.55 = 8,947.31 : x
  2. Step 2: Convert to fraction form
    15,659.52/21,610.55 = 8,947.31/x
  3. Step 3: Cross multiply
    15,659.52x = 21,610.55 × 8,947.31
  4. Step 4: Simplify right side
    15,659.52x = 193,356,235.60
  5. Step 5: Solve for x
    x = 193,356,235.60/15,659.52
  6. Step 6: Final answer
    x = 12,347.52

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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.