Home / 27,921.08-38,520.11-15,978.02

Finding the Fourth Proportional to 27,921.08, 38,520.11 and 15,978.02

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Solution

The fourth proportional to 27,921.08, 38,520.11 and 15,978.02 is: 22,043.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,921.08 : 38,520.11 = 15,978.02 : x
  2. Step 2: Convert to fraction form
    27,921.08/38,520.11 = 15,978.02/x
  3. Step 3: Cross multiply
    27,921.08x = 38,520.11 × 15,978.02
  4. Step 4: Simplify right side
    27,921.08x = 615,475,008.09
  5. Step 5: Solve for x
    x = 615,475,008.09/27,921.08
  6. Step 6: Final answer
    x = 22,043.38

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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.