Home / 20,576.16-28,384.80-12,917.76

Finding the Fourth Proportional to 20,576.16, 28,384.80 and 12,917.76

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Solution

The fourth proportional to 20,576.16, 28,384.80 and 12,917.76 is: 17,820.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,576.16 : 28,384.80 = 12,917.76 : x
  2. Step 2: Convert to fraction form
    20,576.16/28,384.80 = 12,917.76/x
  3. Step 3: Cross multiply
    20,576.16x = 28,384.80 × 12,917.76
  4. Step 4: Simplify right side
    20,576.16x = 366,668,034.05
  5. Step 5: Solve for x
    x = 366,668,034.05/20,576.16
  6. Step 6: Final answer
    x = 17,820.04

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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.