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Finding the Fourth Proportional to 15,659.60, 21,610.20 and 8,586

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Solution

The fourth proportional to 15,659.60, 21,610.20 and 8,586 is: 11,848.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.60 : 21,610.20 = 8,586 : x
  2. Step 2: Convert to fraction form
    15,659.60/21,610.20 = 8,586/x
  3. Step 3: Cross multiply
    15,659.60x = 21,610.20 × 8,586
  4. Step 4: Simplify right side
    15,659.60x = 185,545,177.20
  5. Step 5: Solve for x
    x = 185,545,177.20/15,659.60
  6. Step 6: Final answer
    x = 11,848.65

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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.