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Finding the Fourth Proportional to 18,119.61, 25,007.80 and 11,050.13

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Solution

The fourth proportional to 18,119.61, 25,007.80 and 11,050.13 is: 15,250.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,119.61 : 25,007.80 = 11,050.13 : x
  2. Step 2: Convert to fraction form
    18,119.61/25,007.80 = 11,050.13/x
  3. Step 3: Cross multiply
    18,119.61x = 25,007.80 × 11,050.13
  4. Step 4: Simplify right side
    18,119.61x = 276,339,385.76
  5. Step 5: Solve for x
    x = 276,339,385.76/18,119.61
  6. Step 6: Final answer
    x = 15,250.85

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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.