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Finding the Fourth Proportional to 18,205.93, 25,123.70 and 10,139.61

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Solution

The fourth proportional to 18,205.93, 25,123.70 and 10,139.61 is: 13,992.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,205.93 : 25,123.70 = 10,139.61 : x
  2. Step 2: Convert to fraction form
    18,205.93/25,123.70 = 10,139.61/x
  3. Step 3: Cross multiply
    18,205.93x = 25,123.70 × 10,139.61
  4. Step 4: Simplify right side
    18,205.93x = 254,744,639.32
  5. Step 5: Solve for x
    x = 254,744,639.32/18,205.93
  6. Step 6: Final answer
    x = 13,992.40

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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.