Home / 5,428.20-7,490.64-3,657

Finding the Fourth Proportional to 5,428.20, 7,490.64 and 3,657

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Solution

The fourth proportional to 5,428.20, 7,490.64 and 3,657 is: 5,046.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.20 : 7,490.64 = 3,657 : x
  2. Step 2: Convert to fraction form
    5,428.20/7,490.64 = 3,657/x
  3. Step 3: Cross multiply
    5,428.20x = 7,490.64 × 3,657
  4. Step 4: Simplify right side
    5,428.20x = 27,393,270.48
  5. Step 5: Solve for x
    x = 27,393,270.48/5,428.20
  6. Step 6: Final answer
    x = 5,046.47

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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.