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Finding the Fourth Proportional to 15,206.32, 20,978.94 and 11,236.96

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Solution

The fourth proportional to 15,206.32, 20,978.94 and 11,236.96 is: 15,502.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,206.32 : 20,978.94 = 11,236.96 : x
  2. Step 2: Convert to fraction form
    15,206.32/20,978.94 = 11,236.96/x
  3. Step 3: Cross multiply
    15,206.32x = 20,978.94 × 11,236.96
  4. Step 4: Simplify right side
    15,206.32x = 235,739,509.62
  5. Step 5: Solve for x
    x = 235,739,509.62/15,206.32
  6. Step 6: Final answer
    x = 15,502.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.