Home / 13,121.35-19,680.17-3,762.17

Finding the Fourth Proportional to 13,121.35, 19,680.17 and 3,762.17

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Solution

The fourth proportional to 13,121.35, 19,680.17 and 3,762.17 is: 5,642.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.35 : 19,680.17 = 3,762.17 : x
  2. Step 2: Convert to fraction form
    13,121.35/19,680.17 = 3,762.17/x
  3. Step 3: Cross multiply
    13,121.35x = 19,680.17 × 3,762.17
  4. Step 4: Simplify right side
    13,121.35x = 74,040,056.17
  5. Step 5: Solve for x
    x = 74,040,056.17/13,121.35
  6. Step 6: Final answer
    x = 5,642.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.