Home / 7,115.96-9,821.01-3,972.35

Finding the Fourth Proportional to 7,115.96, 9,821.01 and 3,972.35

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Solution

The fourth proportional to 7,115.96, 9,821.01 and 3,972.35 is: 5,482.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.96 : 9,821.01 = 3,972.35 : x
  2. Step 2: Convert to fraction form
    7,115.96/9,821.01 = 3,972.35/x
  3. Step 3: Cross multiply
    7,115.96x = 9,821.01 × 3,972.35
  4. Step 4: Simplify right side
    7,115.96x = 39,012,489.07
  5. Step 5: Solve for x
    x = 39,012,489.07/7,115.96
  6. Step 6: Final answer
    x = 5,482.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.