Home / 8,531.76-11,778.96-5,349.78

Finding the Fourth Proportional to 8,531.76, 11,778.96 and 5,349.78

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Solution

The fourth proportional to 8,531.76, 11,778.96 and 5,349.78 is: 7,385.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,531.76 : 11,778.96 = 5,349.78 : x
  2. Step 2: Convert to fraction form
    8,531.76/11,778.96 = 5,349.78/x
  3. Step 3: Cross multiply
    8,531.76x = 11,778.96 × 5,349.78
  4. Step 4: Simplify right side
    8,531.76x = 63,014,844.63
  5. Step 5: Solve for x
    x = 63,014,844.63/8,531.76
  6. Step 6: Final answer
    x = 7,385.91

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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.