Home / 7,122.52-9,829.38-4,139.02

Finding the Fourth Proportional to 7,122.52, 9,829.38 and 4,139.02

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Solution

The fourth proportional to 7,122.52, 9,829.38 and 4,139.02 is: 5,712.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.52 : 9,829.38 = 4,139.02 : x
  2. Step 2: Convert to fraction form
    7,122.52/9,829.38 = 4,139.02/x
  3. Step 3: Cross multiply
    7,122.52x = 9,829.38 × 4,139.02
  4. Step 4: Simplify right side
    7,122.52x = 40,684,000.41
  5. Step 5: Solve for x
    x = 40,684,000.41/7,122.52
  6. Step 6: Final answer
    x = 5,712.02

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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.