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Finding the Fourth Proportional to 28,041.91, 42,063.13 and 8,320.47

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Solution

The fourth proportional to 28,041.91, 42,063.13 and 8,320.47 is: 12,480.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,041.91 : 42,063.13 = 8,320.47 : x
  2. Step 2: Convert to fraction form
    28,041.91/42,063.13 = 8,320.47/x
  3. Step 3: Cross multiply
    28,041.91x = 42,063.13 × 8,320.47
  4. Step 4: Simplify right side
    28,041.91x = 349,985,100.54
  5. Step 5: Solve for x
    x = 349,985,100.54/28,041.91
  6. Step 6: Final answer
    x = 12,480.79

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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.