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Finding the Fourth Proportional to 18,456.95, 25,472.19 and 15,090.39

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Solution

The fourth proportional to 18,456.95, 25,472.19 and 15,090.39 is: 20,826.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,456.95 : 25,472.19 = 15,090.39 : x
  2. Step 2: Convert to fraction form
    18,456.95/25,472.19 = 15,090.39/x
  3. Step 3: Cross multiply
    18,456.95x = 25,472.19 × 15,090.39
  4. Step 4: Simplify right side
    18,456.95x = 384,385,281.25
  5. Step 5: Solve for x
    x = 384,385,281.25/18,456.95
  6. Step 6: Final answer
    x = 20,826.05

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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.