Home / 13,089.20-18,062.92-7,120.80

Finding the Fourth Proportional to 13,089.20, 18,062.92 and 7,120.80

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Solution

The fourth proportional to 13,089.20, 18,062.92 and 7,120.80 is: 9,826.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.20 : 18,062.92 = 7,120.80 : x
  2. Step 2: Convert to fraction form
    13,089.20/18,062.92 = 7,120.80/x
  3. Step 3: Cross multiply
    13,089.20x = 18,062.92 × 7,120.80
  4. Step 4: Simplify right side
    13,089.20x = 128,622,440.74
  5. Step 5: Solve for x
    x = 128,622,440.74/13,089.20
  6. Step 6: Final answer
    x = 9,826.61

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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.