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Finding the Fourth Proportional to 16,981.20, 25,423.20 and 15,231.60

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Solution

The fourth proportional to 16,981.20, 25,423.20 and 15,231.60 is: 22,803.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,981.20 : 25,423.20 = 15,231.60 : x
  2. Step 2: Convert to fraction form
    16,981.20/25,423.20 = 15,231.60/x
  3. Step 3: Cross multiply
    16,981.20x = 25,423.20 × 15,231.60
  4. Step 4: Simplify right side
    16,981.20x = 387,236,013.12
  5. Step 5: Solve for x
    x = 387,236,013.12/16,981.20
  6. Step 6: Final answer
    x = 22,803.81

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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.