Home / 20,491.10-28,280.41-11,540.35

Finding the Fourth Proportional to 20,491.10, 28,280.41 and 11,540.35

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Solution

The fourth proportional to 20,491.10, 28,280.41 and 11,540.35 is: 15,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.10 : 28,280.41 = 11,540.35 : x
  2. Step 2: Convert to fraction form
    20,491.10/28,280.41 = 11,540.35/x
  3. Step 3: Cross multiply
    20,491.10x = 28,280.41 × 11,540.35
  4. Step 4: Simplify right side
    20,491.10x = 326,365,829.54
  5. Step 5: Solve for x
    x = 326,365,829.54/20,491.10
  6. Step 6: Final answer
    x = 15,927.20

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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.