Home / 13,135.84-18,128.18-7,167.55

Finding the Fourth Proportional to 13,135.84, 18,128.18 and 7,167.55

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Solution

The fourth proportional to 13,135.84, 18,128.18 and 7,167.55 is: 9,891.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.84 : 18,128.18 = 7,167.55 : x
  2. Step 2: Convert to fraction form
    13,135.84/18,128.18 = 7,167.55/x
  3. Step 3: Cross multiply
    13,135.84x = 18,128.18 × 7,167.55
  4. Step 4: Simplify right side
    13,135.84x = 129,934,648.48
  5. Step 5: Solve for x
    x = 129,934,648.48/13,135.84
  6. Step 6: Final answer
    x = 9,891.61

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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.