Home / 5,129-7,080.90-3,931.72

Finding the Fourth Proportional to 5,129, 7,080.90 and 3,931.72

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Solution

The fourth proportional to 5,129, 7,080.90 and 3,931.72 is: 5,427.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129 : 7,080.90 = 3,931.72 : x
  2. Step 2: Convert to fraction form
    5,129/7,080.90 = 3,931.72/x
  3. Step 3: Cross multiply
    5,129x = 7,080.90 × 3,931.72
  4. Step 4: Simplify right side
    5,129x = 27,840,116.15
  5. Step 5: Solve for x
    x = 27,840,116.15/5,129
  6. Step 6: Final answer
    x = 5,427.98

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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.