Home / 12,931.12-19,397.10-3,571.84

Finding the Fourth Proportional to 12,931.12, 19,397.10 and 3,571.84

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Solution

The fourth proportional to 12,931.12, 19,397.10 and 3,571.84 is: 5,357.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.12 : 19,397.10 = 3,571.84 : x
  2. Step 2: Convert to fraction form
    12,931.12/19,397.10 = 3,571.84/x
  3. Step 3: Cross multiply
    12,931.12x = 19,397.10 × 3,571.84
  4. Step 4: Simplify right side
    12,931.12x = 69,283,337.66
  5. Step 5: Solve for x
    x = 69,283,337.66/12,931.12
  6. Step 6: Final answer
    x = 5,357.88

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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.