Home / 27,979.28-38,610.60-15,403.76

Finding the Fourth Proportional to 27,979.28, 38,610.60 and 15,403.76

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Solution

The fourth proportional to 27,979.28, 38,610.60 and 15,403.76 is: 21,256.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,979.28 : 38,610.60 = 15,403.76 : x
  2. Step 2: Convert to fraction form
    27,979.28/38,610.60 = 15,403.76/x
  3. Step 3: Cross multiply
    27,979.28x = 38,610.60 × 15,403.76
  4. Step 4: Simplify right side
    27,979.28x = 594,748,415.86
  5. Step 5: Solve for x
    x = 594,748,415.86/27,979.28
  6. Step 6: Final answer
    x = 21,256.74

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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.