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Finding the Fourth Proportional to 18,398.86, 27,598.29 and 5,918.61

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Solution

The fourth proportional to 18,398.86, 27,598.29 and 5,918.61 is: 8,877.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.86 : 27,598.29 = 5,918.61 : x
  2. Step 2: Convert to fraction form
    18,398.86/27,598.29 = 5,918.61/x
  3. Step 3: Cross multiply
    18,398.86x = 27,598.29 × 5,918.61
  4. Step 4: Simplify right side
    18,398.86x = 163,343,515.18
  5. Step 5: Solve for x
    x = 163,343,515.18/18,398.86
  6. Step 6: Final answer
    x = 8,877.92

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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.