Home / 12,507.78-18,761.70-3,742.80

Finding the Fourth Proportional to 12,507.78, 18,761.70 and 3,742.80

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Solution

The fourth proportional to 12,507.78, 18,761.70 and 3,742.80 is: 5,614.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,507.78 : 18,761.70 = 3,742.80 : x
  2. Step 2: Convert to fraction form
    12,507.78/18,761.70 = 3,742.80/x
  3. Step 3: Cross multiply
    12,507.78x = 18,761.70 × 3,742.80
  4. Step 4: Simplify right side
    12,507.78x = 70,221,290.76
  5. Step 5: Solve for x
    x = 70,221,290.76/12,507.78
  6. Step 6: Final answer
    x = 5,614.21

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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.