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Finding the Fourth Proportional to 18,387, 25,374.12 and 10,003.50

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Solution

The fourth proportional to 18,387, 25,374.12 and 10,003.50 is: 13,804.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,387 : 25,374.12 = 10,003.50 : x
  2. Step 2: Convert to fraction form
    18,387/25,374.12 = 10,003.50/x
  3. Step 3: Cross multiply
    18,387x = 25,374.12 × 10,003.50
  4. Step 4: Simplify right side
    18,387x = 253,830,009.42
  5. Step 5: Solve for x
    x = 253,830,009.42/18,387
  6. Step 6: Final answer
    x = 13,804.86

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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.