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Finding the Fourth Proportional to 38,507.28, 57,761.28 and 12,210

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Solution

The fourth proportional to 38,507.28, 57,761.28 and 12,210 is: 18,315.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,507.28 : 57,761.28 = 12,210 : x
  2. Step 2: Convert to fraction form
    38,507.28/57,761.28 = 12,210/x
  3. Step 3: Cross multiply
    38,507.28x = 57,761.28 × 12,210
  4. Step 4: Simplify right side
    38,507.28x = 705,265,228.80
  5. Step 5: Solve for x
    x = 705,265,228.80/38,507.28
  6. Step 6: Final answer
    x = 18,315.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.