Home / 28,418.50-39,217.01-15,672.86

Finding the Fourth Proportional to 28,418.50, 39,217.01 and 15,672.86

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Solution

The fourth proportional to 28,418.50, 39,217.01 and 15,672.86 is: 21,628.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,418.50 : 39,217.01 = 15,672.86 : x
  2. Step 2: Convert to fraction form
    28,418.50/39,217.01 = 15,672.86/x
  3. Step 3: Cross multiply
    28,418.50x = 39,217.01 × 15,672.86
  4. Step 4: Simplify right side
    28,418.50x = 614,642,688.80
  5. Step 5: Solve for x
    x = 614,642,688.80/28,418.50
  6. Step 6: Final answer
    x = 21,628.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.