Home / 13,137.70-18,130.41-7,169.75

Finding the Fourth Proportional to 13,137.70, 18,130.41 and 7,169.75

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Solution

The fourth proportional to 13,137.70, 18,130.41 and 7,169.75 is: 9,894.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.70 : 18,130.41 = 7,169.75 : x
  2. Step 2: Convert to fraction form
    13,137.70/18,130.41 = 7,169.75/x
  3. Step 3: Cross multiply
    13,137.70x = 18,130.41 × 7,169.75
  4. Step 4: Simplify right side
    13,137.70x = 129,990,552.42
  5. Step 5: Solve for x
    x = 129,990,552.42/13,137.70
  6. Step 6: Final answer
    x = 9,894.47

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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.