Home / 13,431.84-18,542.04-9,189.72

Finding the Fourth Proportional to 13,431.84, 18,542.04 and 9,189.72

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Solution

The fourth proportional to 13,431.84, 18,542.04 and 9,189.72 is: 12,685.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.84 : 18,542.04 = 9,189.72 : x
  2. Step 2: Convert to fraction form
    13,431.84/18,542.04 = 9,189.72/x
  3. Step 3: Cross multiply
    13,431.84x = 18,542.04 × 9,189.72
  4. Step 4: Simplify right side
    13,431.84x = 170,396,155.83
  5. Step 5: Solve for x
    x = 170,396,155.83/13,431.84
  6. Step 6: Final answer
    x = 12,685.99

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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.