Home / 13,187.15-18,198.75-7,521.84

Finding the Fourth Proportional to 13,187.15, 18,198.75 and 7,521.84

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Solution

The fourth proportional to 13,187.15, 18,198.75 and 7,521.84 is: 10,380.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.15 : 18,198.75 = 7,521.84 : x
  2. Step 2: Convert to fraction form
    13,187.15/18,198.75 = 7,521.84/x
  3. Step 3: Cross multiply
    13,187.15x = 18,198.75 × 7,521.84
  4. Step 4: Simplify right side
    13,187.15x = 136,888,085.70
  5. Step 5: Solve for x
    x = 136,888,085.70/13,187.15
  6. Step 6: Final answer
    x = 10,380.41

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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.