Home / 15,090.96-20,826.28-8,377.20

Finding the Fourth Proportional to 15,090.96, 20,826.28 and 8,377.20

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Solution

The fourth proportional to 15,090.96, 20,826.28 and 8,377.20 is: 11,560.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.96 : 20,826.28 = 8,377.20 : x
  2. Step 2: Convert to fraction form
    15,090.96/20,826.28 = 8,377.20/x
  3. Step 3: Cross multiply
    15,090.96x = 20,826.28 × 8,377.20
  4. Step 4: Simplify right side
    15,090.96x = 174,465,912.82
  5. Step 5: Solve for x
    x = 174,465,912.82/15,090.96
  6. Step 6: Final answer
    x = 11,560.96

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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.