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Finding the Fourth Proportional to 28,039.52, 42,054.96 and 8,319.80

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Solution

The fourth proportional to 28,039.52, 42,054.96 and 8,319.80 is: 12,478.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,039.52 : 42,054.96 = 8,319.80 : x
  2. Step 2: Convert to fraction form
    28,039.52/42,054.96 = 8,319.80/x
  3. Step 3: Cross multiply
    28,039.52x = 42,054.96 × 8,319.80
  4. Step 4: Simplify right side
    28,039.52x = 349,888,856.21
  5. Step 5: Solve for x
    x = 349,888,856.21/28,039.52
  6. Step 6: Final answer
    x = 12,478.42

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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.