Home / 13,089.18-18,062.80-7,121

Finding the Fourth Proportional to 13,089.18, 18,062.80 and 7,121

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Solution

The fourth proportional to 13,089.18, 18,062.80 and 7,121 is: 9,826.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.18 : 18,062.80 = 7,121 : x
  2. Step 2: Convert to fraction form
    13,089.18/18,062.80 = 7,121/x
  3. Step 3: Cross multiply
    13,089.18x = 18,062.80 × 7,121
  4. Step 4: Simplify right side
    13,089.18x = 128,625,198.80
  5. Step 5: Solve for x
    x = 128,625,198.80/13,089.18
  6. Step 6: Final answer
    x = 9,826.83

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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.