Home / 7,129.95-9,841.79-4,146.72

Finding the Fourth Proportional to 7,129.95, 9,841.79 and 4,146.72

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Solution

The fourth proportional to 7,129.95, 9,841.79 and 4,146.72 is: 5,723.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.95 : 9,841.79 = 4,146.72 : x
  2. Step 2: Convert to fraction form
    7,129.95/9,841.79 = 4,146.72/x
  3. Step 3: Cross multiply
    7,129.95x = 9,841.79 × 4,146.72
  4. Step 4: Simplify right side
    7,129.95x = 40,811,126.70
  5. Step 5: Solve for x
    x = 40,811,126.70/7,129.95
  6. Step 6: Final answer
    x = 5,723.90

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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.