Home / 20,470.32-28,236.60-12,512.88

Finding the Fourth Proportional to 20,470.32, 28,236.60 and 12,512.88

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Solution

The fourth proportional to 20,470.32, 28,236.60 and 12,512.88 is: 17,260.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.32 : 28,236.60 = 12,512.88 : x
  2. Step 2: Convert to fraction form
    20,470.32/28,236.60 = 12,512.88/x
  3. Step 3: Cross multiply
    20,470.32x = 28,236.60 × 12,512.88
  4. Step 4: Simplify right side
    20,470.32x = 353,321,187.41
  5. Step 5: Solve for x
    x = 353,321,187.41/20,470.32
  6. Step 6: Final answer
    x = 17,260.17

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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.