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Finding the Fourth Proportional to 11,810.20, 17,715.30 and 7,202.20

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Solution

The fourth proportional to 11,810.20, 17,715.30 and 7,202.20 is: 10,803.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,810.20 : 17,715.30 = 7,202.20 : x
  2. Step 2: Convert to fraction form
    11,810.20/17,715.30 = 7,202.20/x
  3. Step 3: Cross multiply
    11,810.20x = 17,715.30 × 7,202.20
  4. Step 4: Simplify right side
    11,810.20x = 127,589,133.66
  5. Step 5: Solve for x
    x = 127,589,133.66/11,810.20
  6. Step 6: Final answer
    x = 10,803.30

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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.