Home / 13,106.85-18,087.57-7,138.55

Finding the Fourth Proportional to 13,106.85, 18,087.57 and 7,138.55

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Solution

The fourth proportional to 13,106.85, 18,087.57 and 7,138.55 is: 9,851.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.85 : 18,087.57 = 7,138.55 : x
  2. Step 2: Convert to fraction form
    13,106.85/18,087.57 = 7,138.55/x
  3. Step 3: Cross multiply
    13,106.85x = 18,087.57 × 7,138.55
  4. Step 4: Simplify right side
    13,106.85x = 129,118,932.39
  5. Step 5: Solve for x
    x = 129,118,932.39/13,106.85
  6. Step 6: Final answer
    x = 9,851.26

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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.