Home / 20,943.72-28,902.10-11,383.40

Finding the Fourth Proportional to 20,943.72, 28,902.10 and 11,383.40

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Solution

The fourth proportional to 20,943.72, 28,902.10 and 11,383.40 is: 15,708.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.72 : 28,902.10 = 11,383.40 : x
  2. Step 2: Convert to fraction form
    20,943.72/28,902.10 = 11,383.40/x
  3. Step 3: Cross multiply
    20,943.72x = 28,902.10 × 11,383.40
  4. Step 4: Simplify right side
    20,943.72x = 329,004,165.14
  5. Step 5: Solve for x
    x = 329,004,165.14/20,943.72
  6. Step 6: Final answer
    x = 15,708.97

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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.