Home / 6,139.29-9,213.57-4,921.40

Finding the Fourth Proportional to 6,139.29, 9,213.57 and 4,921.40

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Solution

The fourth proportional to 6,139.29, 9,213.57 and 4,921.40 is: 7,385.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.29 : 9,213.57 = 4,921.40 : x
  2. Step 2: Convert to fraction form
    6,139.29/9,213.57 = 4,921.40/x
  3. Step 3: Cross multiply
    6,139.29x = 9,213.57 × 4,921.40
  4. Step 4: Simplify right side
    6,139.29x = 45,343,686.43
  5. Step 5: Solve for x
    x = 45,343,686.43/6,139.29
  6. Step 6: Final answer
    x = 7,385.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.