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Finding the Fourth Proportional to 18,302.70, 27,432.45 and 7,772.70

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Solution

The fourth proportional to 18,302.70, 27,432.45 and 7,772.70 is: 11,649.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,302.70 : 27,432.45 = 7,772.70 : x
  2. Step 2: Convert to fraction form
    18,302.70/27,432.45 = 7,772.70/x
  3. Step 3: Cross multiply
    18,302.70x = 27,432.45 × 7,772.70
  4. Step 4: Simplify right side
    18,302.70x = 213,224,204.12
  5. Step 5: Solve for x
    x = 213,224,204.12/18,302.70
  6. Step 6: Final answer
    x = 11,649.88

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1.5x scale

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.