Home / 9,115.38-13,667.85-5,420.19

Finding the Fourth Proportional to 9,115.38, 13,667.85 and 5,420.19

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Solution

The fourth proportional to 9,115.38, 13,667.85 and 5,420.19 is: 8,127.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.38 : 13,667.85 = 5,420.19 : x
  2. Step 2: Convert to fraction form
    9,115.38/13,667.85 = 5,420.19/x
  3. Step 3: Cross multiply
    9,115.38x = 13,667.85 × 5,420.19
  4. Step 4: Simplify right side
    9,115.38x = 74,082,343.89
  5. Step 5: Solve for x
    x = 74,082,343.89/9,115.38
  6. Step 6: Final answer
    x = 8,127.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.