Home / 20,612.39-28,445.72-11,659.71

Finding the Fourth Proportional to 20,612.39, 28,445.72 and 11,659.71

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Solution

The fourth proportional to 20,612.39, 28,445.72 and 11,659.71 is: 16,090.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.39 : 28,445.72 = 11,659.71 : x
  2. Step 2: Convert to fraction form
    20,612.39/28,445.72 = 11,659.71/x
  3. Step 3: Cross multiply
    20,612.39x = 28,445.72 × 11,659.71
  4. Step 4: Simplify right side
    20,612.39x = 331,668,894.31
  5. Step 5: Solve for x
    x = 331,668,894.31/20,612.39
  6. Step 6: Final answer
    x = 16,090.76

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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.