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Finding the Fourth Proportional to 5,657.79, 7,807.82 and 3,139.95

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Solution

The fourth proportional to 5,657.79, 7,807.82 and 3,139.95 is: 4,333.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,657.79 : 7,807.82 = 3,139.95 : x
  2. Step 2: Convert to fraction form
    5,657.79/7,807.82 = 3,139.95/x
  3. Step 3: Cross multiply
    5,657.79x = 7,807.82 × 3,139.95
  4. Step 4: Simplify right side
    5,657.79x = 24,516,164.41
  5. Step 5: Solve for x
    x = 24,516,164.41/5,657.79
  6. Step 6: Final answer
    x = 4,333.17

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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.