Home / 13,161.42-18,160.47-7,855.92

Finding the Fourth Proportional to 13,161.42, 18,160.47 and 7,855.92

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Solution

The fourth proportional to 13,161.42, 18,160.47 and 7,855.92 is: 10,839.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.42 : 18,160.47 = 7,855.92 : x
  2. Step 2: Convert to fraction form
    13,161.42/18,160.47 = 7,855.92/x
  3. Step 3: Cross multiply
    13,161.42x = 18,160.47 × 7,855.92
  4. Step 4: Simplify right side
    13,161.42x = 142,667,199.48
  5. Step 5: Solve for x
    x = 142,667,199.48/13,161.42
  6. Step 6: Final answer
    x = 10,839.80

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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.