Home / 18,965.70-28,407.51-12,371.85

Finding the Fourth Proportional to 18,965.70, 28,407.51 and 12,371.85

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Solution

The fourth proportional to 18,965.70, 28,407.51 and 12,371.85 is: 18,531.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.70 : 28,407.51 = 12,371.85 : x
  2. Step 2: Convert to fraction form
    18,965.70/28,407.51 = 12,371.85/x
  3. Step 3: Cross multiply
    18,965.70x = 28,407.51 × 12,371.85
  4. Step 4: Simplify right side
    18,965.70x = 351,453,452.59
  5. Step 5: Solve for x
    x = 351,453,452.59/18,965.70
  6. Step 6: Final answer
    x = 18,531.00

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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.