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Finding the Fourth Proportional to 15,659.40, 21,609.86 and 8,585.86

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Solution

The fourth proportional to 15,659.40, 21,609.86 and 8,585.86 is: 11,848.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.40 : 21,609.86 = 8,585.86 : x
  2. Step 2: Convert to fraction form
    15,659.40/21,609.86 = 8,585.86/x
  3. Step 3: Cross multiply
    15,659.40x = 21,609.86 × 8,585.86
  4. Step 4: Simplify right side
    15,659.40x = 185,539,232.58
  5. Step 5: Solve for x
    x = 185,539,232.58/15,659.40
  6. Step 6: Final answer
    x = 11,848.43

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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.