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Finding the Fourth Proportional to 15,818.60, 23,727.90 and 9,986.60

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Solution

The fourth proportional to 15,818.60, 23,727.90 and 9,986.60 is: 14,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,818.60 : 23,727.90 = 9,986.60 : x
  2. Step 2: Convert to fraction form
    15,818.60/23,727.90 = 9,986.60/x
  3. Step 3: Cross multiply
    15,818.60x = 23,727.90 × 9,986.60
  4. Step 4: Simplify right side
    15,818.60x = 236,961,046.14
  5. Step 5: Solve for x
    x = 236,961,046.14/15,818.60
  6. Step 6: Final answer
    x = 14,979.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.