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Finding the Fourth Proportional to 7,209.80, 10,813.90 and 2,016.20

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Solution

The fourth proportional to 7,209.80, 10,813.90 and 2,016.20 is: 3,024.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,209.80 : 10,813.90 = 2,016.20 : x
  2. Step 2: Convert to fraction form
    7,209.80/10,813.90 = 2,016.20/x
  3. Step 3: Cross multiply
    7,209.80x = 10,813.90 × 2,016.20
  4. Step 4: Simplify right side
    7,209.80x = 21,802,985.18
  5. Step 5: Solve for x
    x = 21,802,985.18/7,209.80
  6. Step 6: Final answer
    x = 3,024.08

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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.