Home / 20,320.78-28,044.16-11,371.16

Finding the Fourth Proportional to 20,320.78, 28,044.16 and 11,371.16

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Solution

The fourth proportional to 20,320.78, 28,044.16 and 11,371.16 is: 15,693.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.78 : 28,044.16 = 11,371.16 : x
  2. Step 2: Convert to fraction form
    20,320.78/28,044.16 = 11,371.16/x
  3. Step 3: Cross multiply
    20,320.78x = 28,044.16 × 11,371.16
  4. Step 4: Simplify right side
    20,320.78x = 318,894,630.43
  5. Step 5: Solve for x
    x = 318,894,630.43/20,320.78
  6. Step 6: Final answer
    x = 15,693.03

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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.