Home / 20,752.19-28,629.87-12,780.58

Finding the Fourth Proportional to 20,752.19, 28,629.87 and 12,780.58

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Solution

The fourth proportional to 20,752.19, 28,629.87 and 12,780.58 is: 17,632.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.19 : 28,629.87 = 12,780.58 : x
  2. Step 2: Convert to fraction form
    20,752.19/28,629.87 = 12,780.58/x
  3. Step 3: Cross multiply
    20,752.19x = 28,629.87 × 12,780.58
  4. Step 4: Simplify right side
    20,752.19x = 365,906,343.92
  5. Step 5: Solve for x
    x = 365,906,343.92/20,752.19
  6. Step 6: Final answer
    x = 17,632.18

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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.