Home / 28,155.92-38,853.56-15,579.92

Finding the Fourth Proportional to 28,155.92, 38,853.56 and 15,579.92

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Solution

The fourth proportional to 28,155.92, 38,853.56 and 15,579.92 is: 21,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.92 : 38,853.56 = 15,579.92 : x
  2. Step 2: Convert to fraction form
    28,155.92/38,853.56 = 15,579.92/x
  3. Step 3: Cross multiply
    28,155.92x = 38,853.56 × 15,579.92
  4. Step 4: Simplify right side
    28,155.92x = 605,335,356.52
  5. Step 5: Solve for x
    x = 605,335,356.52/28,155.92
  6. Step 6: Final answer
    x = 21,499.40

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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.