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Finding the Fourth Proportional to 18,384.72, 25,347.24 and 13,356.24

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Solution

The fourth proportional to 18,384.72, 25,347.24 and 13,356.24 is: 18,414.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,384.72 : 25,347.24 = 13,356.24 : x
  2. Step 2: Convert to fraction form
    18,384.72/25,347.24 = 13,356.24/x
  3. Step 3: Cross multiply
    18,384.72x = 25,347.24 × 13,356.24
  4. Step 4: Simplify right side
    18,384.72x = 338,543,820.78
  5. Step 5: Solve for x
    x = 338,543,820.78/18,384.72
  6. Step 6: Final answer
    x = 18,414.41

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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.