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Finding the Fourth Proportional to 5,657.82, 7,807.80 and 3,139.86

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Solution

The fourth proportional to 5,657.82, 7,807.80 and 3,139.86 is: 4,333.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,657.82 : 7,807.80 = 3,139.86 : x
  2. Step 2: Convert to fraction form
    5,657.82/7,807.80 = 3,139.86/x
  3. Step 3: Cross multiply
    5,657.82x = 7,807.80 × 3,139.86
  4. Step 4: Simplify right side
    5,657.82x = 24,515,398.91
  5. Step 5: Solve for x
    x = 24,515,398.91/5,657.82
  6. Step 6: Final answer
    x = 4,333.01

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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.