Home / 28,239.76-38,969.26-15,490.41

Finding the Fourth Proportional to 28,239.76, 38,969.26 and 15,490.41

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Solution

The fourth proportional to 28,239.76, 38,969.26 and 15,490.41 is: 21,375.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.76 : 38,969.26 = 15,490.41 : x
  2. Step 2: Convert to fraction form
    28,239.76/38,969.26 = 15,490.41/x
  3. Step 3: Cross multiply
    28,239.76x = 38,969.26 × 15,490.41
  4. Step 4: Simplify right side
    28,239.76x = 603,649,814.80
  5. Step 5: Solve for x
    x = 603,649,814.80/28,239.76
  6. Step 6: Final answer
    x = 21,375.88

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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.