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Finding the Fourth Proportional to 8,042.80, 11,085.20 and 5,349.20

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Solution

The fourth proportional to 8,042.80, 11,085.20 and 5,349.20 is: 7,372.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,042.80 : 11,085.20 = 5,349.20 : x
  2. Step 2: Convert to fraction form
    8,042.80/11,085.20 = 5,349.20/x
  3. Step 3: Cross multiply
    8,042.80x = 11,085.20 × 5,349.20
  4. Step 4: Simplify right side
    8,042.80x = 59,296,967.13
  5. Step 5: Solve for x
    x = 59,296,967.13/8,042.80
  6. Step 6: Final answer
    x = 7,372.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.