Home / 8,739.28-12,049.72-7,140

Finding the Fourth Proportional to 8,739.28, 12,049.72 and 7,140

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Solution

The fourth proportional to 8,739.28, 12,049.72 and 7,140 is: 9,844.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.28 : 12,049.72 = 7,140 : x
  2. Step 2: Convert to fraction form
    8,739.28/12,049.72 = 7,140/x
  3. Step 3: Cross multiply
    8,739.28x = 12,049.72 × 7,140
  4. Step 4: Simplify right side
    8,739.28x = 86,035,000.80
  5. Step 5: Solve for x
    x = 86,035,000.80/8,739.28
  6. Step 6: Final answer
    x = 9,844.63

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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.