Home / 12,909.38-19,361.74-3,421.76

Finding the Fourth Proportional to 12,909.38, 19,361.74 and 3,421.76

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Solution

The fourth proportional to 12,909.38, 19,361.74 and 3,421.76 is: 5,132.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.38 : 19,361.74 = 3,421.76 : x
  2. Step 2: Convert to fraction form
    12,909.38/19,361.74 = 3,421.76/x
  3. Step 3: Cross multiply
    12,909.38x = 19,361.74 × 3,421.76
  4. Step 4: Simplify right side
    12,909.38x = 66,251,227.46
  5. Step 5: Solve for x
    x = 66,251,227.46/12,909.38
  6. Step 6: Final answer
    x = 5,132.02

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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.