Home / 20,375.55-28,116.32-11,423.43

Finding the Fourth Proportional to 20,375.55, 28,116.32 and 11,423.43

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Solution

The fourth proportional to 20,375.55, 28,116.32 and 11,423.43 is: 15,763.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.55 : 28,116.32 = 11,423.43 : x
  2. Step 2: Convert to fraction form
    20,375.55/28,116.32 = 11,423.43/x
  3. Step 3: Cross multiply
    20,375.55x = 28,116.32 × 11,423.43
  4. Step 4: Simplify right side
    20,375.55x = 321,184,756.26
  5. Step 5: Solve for x
    x = 321,184,756.26/20,375.55
  6. Step 6: Final answer
    x = 15,763.24

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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.