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Finding the Fourth Proportional to 18,484.80, 27,721.80 and 6,637.20

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Solution

The fourth proportional to 18,484.80, 27,721.80 and 6,637.20 is: 9,953.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,484.80 : 27,721.80 = 6,637.20 : x
  2. Step 2: Convert to fraction form
    18,484.80/27,721.80 = 6,637.20/x
  3. Step 3: Cross multiply
    18,484.80x = 27,721.80 × 6,637.20
  4. Step 4: Simplify right side
    18,484.80x = 183,995,130.96
  5. Step 5: Solve for x
    x = 183,995,130.96/18,484.80
  6. Step 6: Final answer
    x = 9,953.86

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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.