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Finding the Fourth Proportional to 28,108.32, 42,162.48 and 9,640.48

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Solution

The fourth proportional to 28,108.32, 42,162.48 and 9,640.48 is: 14,460.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.32 : 42,162.48 = 9,640.48 : x
  2. Step 2: Convert to fraction form
    28,108.32/42,162.48 = 9,640.48/x
  3. Step 3: Cross multiply
    28,108.32x = 42,162.48 × 9,640.48
  4. Step 4: Simplify right side
    28,108.32x = 406,466,545.19
  5. Step 5: Solve for x
    x = 406,466,545.19/28,108.32
  6. Step 6: Final answer
    x = 14,460.72

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1.5x scale

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.