Home / 20,445.56-28,206.88-11,491

Finding the Fourth Proportional to 20,445.56, 28,206.88 and 11,491

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Solution

The fourth proportional to 20,445.56, 28,206.88 and 11,491 is: 15,853.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.56 : 28,206.88 = 11,491 : x
  2. Step 2: Convert to fraction form
    20,445.56/28,206.88 = 11,491/x
  3. Step 3: Cross multiply
    20,445.56x = 28,206.88 × 11,491
  4. Step 4: Simplify right side
    20,445.56x = 324,125,258.08
  5. Step 5: Solve for x
    x = 324,125,258.08/20,445.56
  6. Step 6: Final answer
    x = 15,853.09

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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.