Home / 21,267.29-31,903.11-8,130.71

Finding the Fourth Proportional to 21,267.29, 31,903.11 and 8,130.71

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Solution

The fourth proportional to 21,267.29, 31,903.11 and 8,130.71 is: 12,196.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,267.29 : 31,903.11 = 8,130.71 : x
  2. Step 2: Convert to fraction form
    21,267.29/31,903.11 = 8,130.71/x
  3. Step 3: Cross multiply
    21,267.29x = 31,903.11 × 8,130.71
  4. Step 4: Simplify right side
    21,267.29x = 259,394,775.99
  5. Step 5: Solve for x
    x = 259,394,775.99/21,267.29
  6. Step 6: Final answer
    x = 12,196.89

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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.