Home / 20,631.38-28,471.64-11,199.94

Finding the Fourth Proportional to 20,631.38, 28,471.64 and 11,199.94

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Solution

The fourth proportional to 20,631.38, 28,471.64 and 11,199.94 is: 15,456.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.38 : 28,471.64 = 11,199.94 : x
  2. Step 2: Convert to fraction form
    20,631.38/28,471.64 = 11,199.94/x
  3. Step 3: Cross multiply
    20,631.38x = 28,471.64 × 11,199.94
  4. Step 4: Simplify right side
    20,631.38x = 318,880,595.52
  5. Step 5: Solve for x
    x = 318,880,595.52/20,631.38
  6. Step 6: Final answer
    x = 15,456.10

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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.