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Finding the Fourth Proportional to 18,658,843.20, 27,988,264.80 and 18,658,843.20

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Solution

The fourth proportional to 18,658,843.20, 27,988,264.80 and 18,658,843.20 is: 27,988,264.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658,843.20 : 27,988,264.80 = 18,658,843.20 : x
  2. Step 2: Convert to fraction form
    18,658,843.20/27,988,264.80 = 18,658,843.20/x
  3. Step 3: Cross multiply
    18,658,843.20x = 27,988,264.80 × 18,658,843.20
  4. Step 4: Simplify right side
    18,658,843.20x = 522,228,644,343,279.38
  5. Step 5: Solve for x
    x = 522,228,644,343,279.38/18,658,843.20
  6. Step 6: Final answer
    x = 27,988,264.80

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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.