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Finding the Fourth Proportional to 18,972.65, 28,444.91 and 9,102.53

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Solution

The fourth proportional to 18,972.65, 28,444.91 and 9,102.53 is: 13,647.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,972.65 : 28,444.91 = 9,102.53 : x
  2. Step 2: Convert to fraction form
    18,972.65/28,444.91 = 9,102.53/x
  3. Step 3: Cross multiply
    18,972.65x = 28,444.91 × 9,102.53
  4. Step 4: Simplify right side
    18,972.65x = 258,920,672.22
  5. Step 5: Solve for x
    x = 258,920,672.22/18,972.65
  6. Step 6: Final answer
    x = 13,647.05

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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.