Home / 20,911.46-31,365.65-6,871.32

Finding the Fourth Proportional to 20,911.46, 31,365.65 and 6,871.32

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Solution

The fourth proportional to 20,911.46, 31,365.65 and 6,871.32 is: 10,306.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.46 : 31,365.65 = 6,871.32 : x
  2. Step 2: Convert to fraction form
    20,911.46/31,365.65 = 6,871.32/x
  3. Step 3: Cross multiply
    20,911.46x = 31,365.65 × 6,871.32
  4. Step 4: Simplify right side
    20,911.46x = 215,523,383.80
  5. Step 5: Solve for x
    x = 215,523,383.80/20,911.46
  6. Step 6: Final answer
    x = 10,306.47

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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.