Home / 18,707.72-25,817.10-11,155.50

Finding the Fourth Proportional to 18,707.72, 25,817.10 and 11,155.50

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Solution

The fourth proportional to 18,707.72, 25,817.10 and 11,155.50 is: 15,394.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707.72 : 25,817.10 = 11,155.50 : x
  2. Step 2: Convert to fraction form
    18,707.72/25,817.10 = 11,155.50/x
  3. Step 3: Cross multiply
    18,707.72x = 25,817.10 × 11,155.50
  4. Step 4: Simplify right side
    18,707.72x = 288,002,659.05
  5. Step 5: Solve for x
    x = 288,002,659.05/18,707.72
  6. Step 6: Final answer
    x = 15,394.86

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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.