Home / 20,579.40-28,397.39-15,204.65

Finding the Fourth Proportional to 20,579.40, 28,397.39 and 15,204.65

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Solution

The fourth proportional to 20,579.40, 28,397.39 and 15,204.65 is: 20,980.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.40 : 28,397.39 = 15,204.65 : x
  2. Step 2: Convert to fraction form
    20,579.40/28,397.39 = 15,204.65/x
  3. Step 3: Cross multiply
    20,579.40x = 28,397.39 × 15,204.65
  4. Step 4: Simplify right side
    20,579.40x = 431,772,157.85
  5. Step 5: Solve for x
    x = 431,772,157.85/20,579.40
  6. Step 6: Final answer
    x = 20,980.79

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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.