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Finding the Fourth Proportional to 18,612.57, 25,711.48 and 16,931.01

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Solution

The fourth proportional to 18,612.57, 25,711.48 and 16,931.01 is: 23,388.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.57 : 25,711.48 = 16,931.01 : x
  2. Step 2: Convert to fraction form
    18,612.57/25,711.48 = 16,931.01/x
  3. Step 3: Cross multiply
    18,612.57x = 25,711.48 × 16,931.01
  4. Step 4: Simplify right side
    18,612.57x = 435,321,324.99
  5. Step 5: Solve for x
    x = 435,321,324.99/18,612.57
  6. Step 6: Final answer
    x = 23,388.57

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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.