Home / 12,742.75-19,105.40-6,490.66

Finding the Fourth Proportional to 12,742.75, 19,105.40 and 6,490.66

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Solution

The fourth proportional to 12,742.75, 19,105.40 and 6,490.66 is: 9,731.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.75 : 19,105.40 = 6,490.66 : x
  2. Step 2: Convert to fraction form
    12,742.75/19,105.40 = 6,490.66/x
  3. Step 3: Cross multiply
    12,742.75x = 19,105.40 × 6,490.66
  4. Step 4: Simplify right side
    12,742.75x = 124,006,655.56
  5. Step 5: Solve for x
    x = 124,006,655.56/12,742.75
  6. Step 6: Final answer
    x = 9,731.55

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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.