Home / 13,121.12-19,680.72-6,545.52

Finding the Fourth Proportional to 13,121.12, 19,680.72 and 6,545.52

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Solution

The fourth proportional to 13,121.12, 19,680.72 and 6,545.52 is: 9,817.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.12 : 19,680.72 = 6,545.52 : x
  2. Step 2: Convert to fraction form
    13,121.12/19,680.72 = 6,545.52/x
  3. Step 3: Cross multiply
    13,121.12x = 19,680.72 × 6,545.52
  4. Step 4: Simplify right side
    13,121.12x = 128,820,546.37
  5. Step 5: Solve for x
    x = 128,820,546.37/13,121.12
  6. Step 6: Final answer
    x = 9,817.80

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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.