Home / 20,947.16-28,908.52-11,515.72

Finding the Fourth Proportional to 20,947.16, 28,908.52 and 11,515.72

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Solution

The fourth proportional to 20,947.16, 28,908.52 and 11,515.72 is: 15,892.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,947.16 : 28,908.52 = 11,515.72 : x
  2. Step 2: Convert to fraction form
    20,947.16/28,908.52 = 11,515.72/x
  3. Step 3: Cross multiply
    20,947.16x = 28,908.52 × 11,515.72
  4. Step 4: Simplify right side
    20,947.16x = 332,902,421.93
  5. Step 5: Solve for x
    x = 332,902,421.93/20,947.16
  6. Step 6: Final answer
    x = 15,892.48

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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.