Home / 5,140.40-7,710.60-3,585.20

Finding the Fourth Proportional to 5,140.40, 7,710.60 and 3,585.20

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Solution

The fourth proportional to 5,140.40, 7,710.60 and 3,585.20 is: 5,377.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,140.40 : 7,710.60 = 3,585.20 : x
  2. Step 2: Convert to fraction form
    5,140.40/7,710.60 = 3,585.20/x
  3. Step 3: Cross multiply
    5,140.40x = 7,710.60 × 3,585.20
  4. Step 4: Simplify right side
    5,140.40x = 27,644,043.12
  5. Step 5: Solve for x
    x = 27,644,043.12/5,140.40
  6. Step 6: Final answer
    x = 5,377.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.