Home / 28,158.97-38,858.79-15,411.86

Finding the Fourth Proportional to 28,158.97, 38,858.79 and 15,411.86

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Solution

The fourth proportional to 28,158.97, 38,858.79 and 15,411.86 is: 21,268.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.97 : 38,858.79 = 15,411.86 : x
  2. Step 2: Convert to fraction form
    28,158.97/38,858.79 = 15,411.86/x
  3. Step 3: Cross multiply
    28,158.97x = 38,858.79 × 15,411.86
  4. Step 4: Simplify right side
    28,158.97x = 598,886,196.66
  5. Step 5: Solve for x
    x = 598,886,196.66/28,158.97
  6. Step 6: Final answer
    x = 21,268.04

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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.