Home / 20,423.85-28,182.74-11,472.33

Finding the Fourth Proportional to 20,423.85, 28,182.74 and 11,472.33

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Solution

The fourth proportional to 20,423.85, 28,182.74 and 11,472.33 is: 15,830.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.85 : 28,182.74 = 11,472.33 : x
  2. Step 2: Convert to fraction form
    20,423.85/28,182.74 = 11,472.33/x
  3. Step 3: Cross multiply
    20,423.85x = 28,182.74 × 11,472.33
  4. Step 4: Simplify right side
    20,423.85x = 323,321,741.91
  5. Step 5: Solve for x
    x = 323,321,741.91/20,423.85
  6. Step 6: Final answer
    x = 15,830.60

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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.