Home / 20,631.31-28,471.52-11,199.86

Finding the Fourth Proportional to 20,631.31, 28,471.52 and 11,199.86

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Solution

The fourth proportional to 20,631.31, 28,471.52 and 11,199.86 is: 15,455.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.31 : 28,471.52 = 11,199.86 : x
  2. Step 2: Convert to fraction form
    20,631.31/28,471.52 = 11,199.86/x
  3. Step 3: Cross multiply
    20,631.31x = 28,471.52 × 11,199.86
  4. Step 4: Simplify right side
    20,631.31x = 318,877,037.99
  5. Step 5: Solve for x
    x = 318,877,037.99/20,631.31
  6. Step 6: Final answer
    x = 15,455.98

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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.