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Finding the Fourth Proportional to 29,152.60, 43,728.90 and 12,509.80

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Solution

The fourth proportional to 29,152.60, 43,728.90 and 12,509.80 is: 18,764.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,152.60 : 43,728.90 = 12,509.80 : x
  2. Step 2: Convert to fraction form
    29,152.60/43,728.90 = 12,509.80/x
  3. Step 3: Cross multiply
    29,152.60x = 43,728.90 × 12,509.80
  4. Step 4: Simplify right side
    29,152.60x = 547,039,793.22
  5. Step 5: Solve for x
    x = 547,039,793.22/29,152.60
  6. Step 6: Final answer
    x = 18,764.70

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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.