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Finding the Fourth Proportional to 28,042.86, 42,068.48 and 8,319.10

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Solution

The fourth proportional to 28,042.86, 42,068.48 and 8,319.10 is: 12,479.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,042.86 : 42,068.48 = 8,319.10 : x
  2. Step 2: Convert to fraction form
    28,042.86/42,068.48 = 8,319.10/x
  3. Step 3: Cross multiply
    28,042.86x = 42,068.48 × 8,319.10
  4. Step 4: Simplify right side
    28,042.86x = 349,971,891.97
  5. Step 5: Solve for x
    x = 349,971,891.97/28,042.86
  6. Step 6: Final answer
    x = 12,479.89

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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.