Home / 15,121.24-20,868.74-9,154.40

Finding the Fourth Proportional to 15,121.24, 20,868.74 and 9,154.40

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Solution

The fourth proportional to 15,121.24, 20,868.74 and 9,154.40 is: 12,633.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.24 : 20,868.74 = 9,154.40 : x
  2. Step 2: Convert to fraction form
    15,121.24/20,868.74 = 9,154.40/x
  3. Step 3: Cross multiply
    15,121.24x = 20,868.74 × 9,154.40
  4. Step 4: Simplify right side
    15,121.24x = 191,040,793.46
  5. Step 5: Solve for x
    x = 191,040,793.46/15,121.24
  6. Step 6: Final answer
    x = 12,633.94

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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.