Home / 13,278.24-18,323.76-7,689.12

Finding the Fourth Proportional to 13,278.24, 18,323.76 and 7,689.12

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Solution

The fourth proportional to 13,278.24, 18,323.76 and 7,689.12 is: 10,610.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.24 : 18,323.76 = 7,689.12 : x
  2. Step 2: Convert to fraction form
    13,278.24/18,323.76 = 7,689.12/x
  3. Step 3: Cross multiply
    13,278.24x = 18,323.76 × 7,689.12
  4. Step 4: Simplify right side
    13,278.24x = 140,893,589.49
  5. Step 5: Solve for x
    x = 140,893,589.49/13,278.24
  6. Step 6: Final answer
    x = 10,610.86

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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.