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Finding the Fourth Proportional to 18,140.76, 27,207.95 and 4,990.01

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Solution

The fourth proportional to 18,140.76, 27,207.95 and 4,990.01 is: 7,484.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,140.76 : 27,207.95 = 4,990.01 : x
  2. Step 2: Convert to fraction form
    18,140.76/27,207.95 = 4,990.01/x
  3. Step 3: Cross multiply
    18,140.76x = 27,207.95 × 4,990.01
  4. Step 4: Simplify right side
    18,140.76x = 135,767,781.59
  5. Step 5: Solve for x
    x = 135,767,781.59/18,140.76
  6. Step 6: Final answer
    x = 7,484.13

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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.