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Finding the Fourth Proportional to 15,409.80, 23,114.70 and 8,387.10

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Solution

The fourth proportional to 15,409.80, 23,114.70 and 8,387.10 is: 12,580.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,409.80 : 23,114.70 = 8,387.10 : x
  2. Step 2: Convert to fraction form
    15,409.80/23,114.70 = 8,387.10/x
  3. Step 3: Cross multiply
    15,409.80x = 23,114.70 × 8,387.10
  4. Step 4: Simplify right side
    15,409.80x = 193,865,300.37
  5. Step 5: Solve for x
    x = 193,865,300.37/15,409.80
  6. Step 6: Final answer
    x = 12,580.65

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Half scale
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Double scale
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Similar ratio
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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.