Home / 20,311.15-28,029.19-11,358.55

Finding the Fourth Proportional to 20,311.15, 28,029.19 and 11,358.55

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Solution

The fourth proportional to 20,311.15, 28,029.19 and 11,358.55 is: 15,674.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.15 : 28,029.19 = 11,358.55 : x
  2. Step 2: Convert to fraction form
    20,311.15/28,029.19 = 11,358.55/x
  3. Step 3: Cross multiply
    20,311.15x = 28,029.19 × 11,358.55
  4. Step 4: Simplify right side
    20,311.15x = 318,370,956.07
  5. Step 5: Solve for x
    x = 318,370,956.07/20,311.15
  6. Step 6: Final answer
    x = 15,674.69

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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.