Home / 12,139.40-16,751.28-7,422.74

Finding the Fourth Proportional to 12,139.40, 16,751.28 and 7,422.74

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Solution

The fourth proportional to 12,139.40, 16,751.28 and 7,422.74 is: 10,242.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.40 : 16,751.28 = 7,422.74 : x
  2. Step 2: Convert to fraction form
    12,139.40/16,751.28 = 7,422.74/x
  3. Step 3: Cross multiply
    12,139.40x = 16,751.28 × 7,422.74
  4. Step 4: Simplify right side
    12,139.40x = 124,340,396.11
  5. Step 5: Solve for x
    x = 124,340,396.11/12,139.40
  6. Step 6: Final answer
    x = 10,242.71

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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.