Home / 7,155.18-9,872.28-4,129.56

Finding the Fourth Proportional to 7,155.18, 9,872.28 and 4,129.56

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Solution

The fourth proportional to 7,155.18, 9,872.28 and 4,129.56 is: 5,697.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.18 : 9,872.28 = 4,129.56 : x
  2. Step 2: Convert to fraction form
    7,155.18/9,872.28 = 4,129.56/x
  3. Step 3: Cross multiply
    7,155.18x = 9,872.28 × 4,129.56
  4. Step 4: Simplify right side
    7,155.18x = 40,768,172.60
  5. Step 5: Solve for x
    x = 40,768,172.60/7,155.18
  6. Step 6: Final answer
    x = 5,697.71

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1.5x scale

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.