Home / 20,947.03-28,907-11,516.20

Finding the Fourth Proportional to 20,947.03, 28,907 and 11,516.20

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Solution

The fourth proportional to 20,947.03, 28,907 and 11,516.20 is: 15,892.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.03 : 28,907 = 11,516.20 : x
  2. Step 2: Convert to fraction form
    20,947.03/28,907 = 11,516.20/x
  3. Step 3: Cross multiply
    20,947.03x = 28,907 × 11,516.20
  4. Step 4: Simplify right side
    20,947.03x = 332,898,793.40
  5. Step 5: Solve for x
    x = 332,898,793.40/20,947.03
  6. Step 6: Final answer
    x = 15,892.41

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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.