Home / 7,129.60-9,838.56-4,145.52

Finding the Fourth Proportional to 7,129.60, 9,838.56 and 4,145.52

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Solution

The fourth proportional to 7,129.60, 9,838.56 and 4,145.52 is: 5,720.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.60 : 9,838.56 = 4,145.52 : x
  2. Step 2: Convert to fraction form
    7,129.60/9,838.56 = 4,145.52/x
  3. Step 3: Cross multiply
    7,129.60x = 9,838.56 × 4,145.52
  4. Step 4: Simplify right side
    7,129.60x = 40,785,947.25
  5. Step 5: Solve for x
    x = 40,785,947.25/7,129.60
  6. Step 6: Final answer
    x = 5,720.65

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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.