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Finding the Fourth Proportional to 15,072.78, 20,800.47 and 8,358.69

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Solution

The fourth proportional to 15,072.78, 20,800.47 and 8,358.69 is: 11,535.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.78 : 20,800.47 = 8,358.69 : x
  2. Step 2: Convert to fraction form
    15,072.78/20,800.47 = 8,358.69/x
  3. Step 3: Cross multiply
    15,072.78x = 20,800.47 × 8,358.69
  4. Step 4: Simplify right side
    15,072.78x = 173,864,680.58
  5. Step 5: Solve for x
    x = 173,864,680.58/15,072.78
  6. Step 6: Final answer
    x = 11,535.01

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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.