Home / 20,937.24-28,919.04-15,655.56

Finding the Fourth Proportional to 20,937.24, 28,919.04 and 15,655.56

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Solution

The fourth proportional to 20,937.24, 28,919.04 and 15,655.56 is: 21,623.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.24 : 28,919.04 = 15,655.56 : x
  2. Step 2: Convert to fraction form
    20,937.24/28,919.04 = 15,655.56/x
  3. Step 3: Cross multiply
    20,937.24x = 28,919.04 × 15,655.56
  4. Step 4: Simplify right side
    20,937.24x = 452,743,765.86
  5. Step 5: Solve for x
    x = 452,743,765.86/20,937.24
  6. Step 6: Final answer
    x = 21,623.85

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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.