Home / 20,708.60-28,580.51-15,418.49

Finding the Fourth Proportional to 20,708.60, 28,580.51 and 15,418.49

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Solution

The fourth proportional to 20,708.60, 28,580.51 and 15,418.49 is: 21,279.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.60 : 28,580.51 = 15,418.49 : x
  2. Step 2: Convert to fraction form
    20,708.60/28,580.51 = 15,418.49/x
  3. Step 3: Cross multiply
    20,708.60x = 28,580.51 × 15,418.49
  4. Step 4: Simplify right side
    20,708.60x = 440,668,230.54
  5. Step 5: Solve for x
    x = 440,668,230.54/20,708.60
  6. Step 6: Final answer
    x = 21,279.48

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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.