Home / 13,428.15-18,527.85-8,122.85

Finding the Fourth Proportional to 13,428.15, 18,527.85 and 8,122.85

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Solution

The fourth proportional to 13,428.15, 18,527.85 and 8,122.85 is: 11,207.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.15 : 18,527.85 = 8,122.85 : x
  2. Step 2: Convert to fraction form
    13,428.15/18,527.85 = 8,122.85/x
  3. Step 3: Cross multiply
    13,428.15x = 18,527.85 × 8,122.85
  4. Step 4: Simplify right side
    13,428.15x = 150,498,946.37
  5. Step 5: Solve for x
    x = 150,498,946.37/13,428.15
  6. Step 6: Final answer
    x = 11,207.72

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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.