Home / 21,267.28-31,903.08-8,130.70

Finding the Fourth Proportional to 21,267.28, 31,903.08 and 8,130.70

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Solution

The fourth proportional to 21,267.28, 31,903.08 and 8,130.70 is: 12,196.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,267.28 : 31,903.08 = 8,130.70 : x
  2. Step 2: Convert to fraction form
    21,267.28/31,903.08 = 8,130.70/x
  3. Step 3: Cross multiply
    21,267.28x = 31,903.08 × 8,130.70
  4. Step 4: Simplify right side
    21,267.28x = 259,394,372.56
  5. Step 5: Solve for x
    x = 259,394,372.56/21,267.28
  6. Step 6: Final answer
    x = 12,196.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.