Home / 20,299.44-28,019.16-12,851.76

Finding the Fourth Proportional to 20,299.44, 28,019.16 and 12,851.76

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Solution

The fourth proportional to 20,299.44, 28,019.16 and 12,851.76 is: 17,739.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.44 : 28,019.16 = 12,851.76 : x
  2. Step 2: Convert to fraction form
    20,299.44/28,019.16 = 12,851.76/x
  3. Step 3: Cross multiply
    20,299.44x = 28,019.16 × 12,851.76
  4. Step 4: Simplify right side
    20,299.44x = 360,095,519.72
  5. Step 5: Solve for x
    x = 360,095,519.72/20,299.44
  6. Step 6: Final answer
    x = 17,739.18

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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.