Home / 20,740.46-31,120.71-10,204.79

Finding the Fourth Proportional to 20,740.46, 31,120.71 and 10,204.79

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Solution

The fourth proportional to 20,740.46, 31,120.71 and 10,204.79 is: 15,312.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.46 : 31,120.71 = 10,204.79 : x
  2. Step 2: Convert to fraction form
    20,740.46/31,120.71 = 10,204.79/x
  3. Step 3: Cross multiply
    20,740.46x = 31,120.71 × 10,204.79
  4. Step 4: Simplify right side
    20,740.46x = 317,580,116.33
  5. Step 5: Solve for x
    x = 317,580,116.33/20,740.46
  6. Step 6: Final answer
    x = 15,312.11

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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.