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Finding the Fourth Proportional to 18,373.97, 25,356.05 and 9,990.45

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Solution

The fourth proportional to 18,373.97, 25,356.05 and 9,990.45 is: 13,786.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,373.97 : 25,356.05 = 9,990.45 : x
  2. Step 2: Convert to fraction form
    18,373.97/25,356.05 = 9,990.45/x
  3. Step 3: Cross multiply
    18,373.97x = 25,356.05 × 9,990.45
  4. Step 4: Simplify right side
    18,373.97x = 253,318,299.77
  5. Step 5: Solve for x
    x = 253,318,299.77/18,373.97
  6. Step 6: Final answer
    x = 13,786.80

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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.