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Finding the Fourth Proportional to 20,642.76, 30,964.14 and 5,060.25

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Solution

The fourth proportional to 20,642.76, 30,964.14 and 5,060.25 is: 7,590.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.76 : 30,964.14 = 5,060.25 : x
  2. Step 2: Convert to fraction form
    20,642.76/30,964.14 = 5,060.25/x
  3. Step 3: Cross multiply
    20,642.76x = 30,964.14 × 5,060.25
  4. Step 4: Simplify right side
    20,642.76x = 156,686,289.44
  5. Step 5: Solve for x
    x = 156,686,289.44/20,642.76
  6. Step 6: Final answer
    x = 7,590.38

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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.