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Finding the Fourth Proportional to 28,290, 42,444.36 and 15,139.44

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Solution

The fourth proportional to 28,290, 42,444.36 and 15,139.44 is: 22,714.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290 : 42,444.36 = 15,139.44 : x
  2. Step 2: Convert to fraction form
    28,290/42,444.36 = 15,139.44/x
  3. Step 3: Cross multiply
    28,290x = 42,444.36 × 15,139.44
  4. Step 4: Simplify right side
    28,290x = 642,583,841.56
  5. Step 5: Solve for x
    x = 642,583,841.56/28,290
  6. Step 6: Final answer
    x = 22,714.17

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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.