Home / 15,142.40-20,896.55-8,427.70

Finding the Fourth Proportional to 15,142.40, 20,896.55 and 8,427.70

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Solution

The fourth proportional to 15,142.40, 20,896.55 and 8,427.70 is: 11,630.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,142.40 : 20,896.55 = 8,427.70 : x
  2. Step 2: Convert to fraction form
    15,142.40/20,896.55 = 8,427.70/x
  3. Step 3: Cross multiply
    15,142.40x = 20,896.55 × 8,427.70
  4. Step 4: Simplify right side
    15,142.40x = 176,109,854.44
  5. Step 5: Solve for x
    x = 176,109,854.44/15,142.40
  6. Step 6: Final answer
    x = 11,630.25

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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.