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Finding the Fourth Proportional to 20,882.76, 28,818 and 11,451.48

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Solution

The fourth proportional to 20,882.76, 28,818 and 11,451.48 is: 15,802.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.76 : 28,818 = 11,451.48 : x
  2. Step 2: Convert to fraction form
    20,882.76/28,818 = 11,451.48/x
  3. Step 3: Cross multiply
    20,882.76x = 28,818 × 11,451.48
  4. Step 4: Simplify right side
    20,882.76x = 330,008,750.64
  5. Step 5: Solve for x
    x = 330,008,750.64/20,882.76
  6. Step 6: Final answer
    x = 15,802.93

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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.