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Finding the Fourth Proportional to 18,997.85, 28,494.54 and 7,901.66

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Solution

The fourth proportional to 18,997.85, 28,494.54 and 7,901.66 is: 11,851.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,997.85 : 28,494.54 = 7,901.66 : x
  2. Step 2: Convert to fraction form
    18,997.85/28,494.54 = 7,901.66/x
  3. Step 3: Cross multiply
    18,997.85x = 28,494.54 × 7,901.66
  4. Step 4: Simplify right side
    18,997.85x = 225,154,024.46
  5. Step 5: Solve for x
    x = 225,154,024.46/18,997.85
  6. Step 6: Final answer
    x = 11,851.56

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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.