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Finding the Fourth Proportional to 18,411.22, 25,409.25 and 11,341.78

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Solution

The fourth proportional to 18,411.22, 25,409.25 and 11,341.78 is: 15,652.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.22 : 25,409.25 = 11,341.78 : x
  2. Step 2: Convert to fraction form
    18,411.22/25,409.25 = 11,341.78/x
  3. Step 3: Cross multiply
    18,411.22x = 25,409.25 × 11,341.78
  4. Step 4: Simplify right side
    18,411.22x = 288,186,123.47
  5. Step 5: Solve for x
    x = 288,186,123.47/18,411.22
  6. Step 6: Final answer
    x = 15,652.74

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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.