Home / 20,670.72-31,005.66-6,630.78

Finding the Fourth Proportional to 20,670.72, 31,005.66 and 6,630.78

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Solution

The fourth proportional to 20,670.72, 31,005.66 and 6,630.78 is: 9,946.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.72 : 31,005.66 = 6,630.78 : x
  2. Step 2: Convert to fraction form
    20,670.72/31,005.66 = 6,630.78/x
  3. Step 3: Cross multiply
    20,670.72x = 31,005.66 × 6,630.78
  4. Step 4: Simplify right side
    20,670.72x = 205,591,710.21
  5. Step 5: Solve for x
    x = 205,591,710.21/20,670.72
  6. Step 6: Final answer
    x = 9,946.04

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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.