Home / 20,772.28-31,175.16-10,917.46

Finding the Fourth Proportional to 20,772.28, 31,175.16 and 10,917.46

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Solution

The fourth proportional to 20,772.28, 31,175.16 and 10,917.46 is: 16,384.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.28 : 31,175.16 = 10,917.46 : x
  2. Step 2: Convert to fraction form
    20,772.28/31,175.16 = 10,917.46/x
  3. Step 3: Cross multiply
    20,772.28x = 31,175.16 × 10,917.46
  4. Step 4: Simplify right side
    20,772.28x = 340,353,562.29
  5. Step 5: Solve for x
    x = 340,353,562.29/20,772.28
  6. Step 6: Final answer
    x = 16,384.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.