Home / 28,216.92-38,939.28-15,641.76

Finding the Fourth Proportional to 28,216.92, 38,939.28 and 15,641.76

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Solution

The fourth proportional to 28,216.92, 38,939.28 and 15,641.76 is: 21,585.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,216.92 : 38,939.28 = 15,641.76 : x
  2. Step 2: Convert to fraction form
    28,216.92/38,939.28 = 15,641.76/x
  3. Step 3: Cross multiply
    28,216.92x = 38,939.28 × 15,641.76
  4. Step 4: Simplify right side
    28,216.92x = 609,078,872.33
  5. Step 5: Solve for x
    x = 609,078,872.33/28,216.92
  6. Step 6: Final answer
    x = 21,585.59

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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.