Home / 20,475.60-28,253.82-12,919.08

Finding the Fourth Proportional to 20,475.60, 28,253.82 and 12,919.08

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Solution

The fourth proportional to 20,475.60, 28,253.82 and 12,919.08 is: 17,826.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,475.60 : 28,253.82 = 12,919.08 : x
  2. Step 2: Convert to fraction form
    20,475.60/28,253.82 = 12,919.08/x
  3. Step 3: Cross multiply
    20,475.60x = 28,253.82 × 12,919.08
  4. Step 4: Simplify right side
    20,475.60x = 365,013,360.89
  5. Step 5: Solve for x
    x = 365,013,360.89/20,475.60
  6. Step 6: Final answer
    x = 17,826.75

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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.