Home / 13,121.08-19,680.80-5,329.69

Finding the Fourth Proportional to 13,121.08, 19,680.80 and 5,329.69

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Solution

The fourth proportional to 13,121.08, 19,680.80 and 5,329.69 is: 7,994.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.08 : 19,680.80 = 5,329.69 : x
  2. Step 2: Convert to fraction form
    13,121.08/19,680.80 = 5,329.69/x
  3. Step 3: Cross multiply
    13,121.08x = 19,680.80 × 5,329.69
  4. Step 4: Simplify right side
    13,121.08x = 104,892,562.95
  5. Step 5: Solve for x
    x = 104,892,562.95/13,121.08
  6. Step 6: Final answer
    x = 7,994.20

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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.