Home / 5,430.29-8,139.20-2,305.71

Finding the Fourth Proportional to 5,430.29, 8,139.20 and 2,305.71

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Solution

The fourth proportional to 5,430.29, 8,139.20 and 2,305.71 is: 3,455.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.29 : 8,139.20 = 2,305.71 : x
  2. Step 2: Convert to fraction form
    5,430.29/8,139.20 = 2,305.71/x
  3. Step 3: Cross multiply
    5,430.29x = 8,139.20 × 2,305.71
  4. Step 4: Simplify right side
    5,430.29x = 18,766,623.30
  5. Step 5: Solve for x
    x = 18,766,623.30/5,430.29
  6. Step 6: Final answer
    x = 3,455.92

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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.