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Finding the Fourth Proportional to 20,647.56, 30,969.69 and 7,502.88

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Solution

The fourth proportional to 20,647.56, 30,969.69 and 7,502.88 is: 11,253.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.56 : 30,969.69 = 7,502.88 : x
  2. Step 2: Convert to fraction form
    20,647.56/30,969.69 = 7,502.88/x
  3. Step 3: Cross multiply
    20,647.56x = 30,969.69 × 7,502.88
  4. Step 4: Simplify right side
    20,647.56x = 232,361,867.71
  5. Step 5: Solve for x
    x = 232,361,867.71/20,647.56
  6. Step 6: Final answer
    x = 11,253.72

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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.