Home / 20,758.32-28,638.99-15,979.72

Finding the Fourth Proportional to 20,758.32, 28,638.99 and 15,979.72

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Solution

The fourth proportional to 20,758.32, 28,638.99 and 15,979.72 is: 22,046.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.32 : 28,638.99 = 15,979.72 : x
  2. Step 2: Convert to fraction form
    20,758.32/28,638.99 = 15,979.72/x
  3. Step 3: Cross multiply
    20,758.32x = 28,638.99 × 15,979.72
  4. Step 4: Simplify right side
    20,758.32x = 457,643,152.83
  5. Step 5: Solve for x
    x = 457,643,152.83/20,758.32
  6. Step 6: Final answer
    x = 22,046.25

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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.