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Finding the Fourth Proportional to 6,987.80, 10,482.20 and 2,605.25

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Solution

The fourth proportional to 6,987.80, 10,482.20 and 2,605.25 is: 3,908.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.80 : 10,482.20 = 2,605.25 : x
  2. Step 2: Convert to fraction form
    6,987.80/10,482.20 = 2,605.25/x
  3. Step 3: Cross multiply
    6,987.80x = 10,482.20 × 2,605.25
  4. Step 4: Simplify right side
    6,987.80x = 27,308,751.55
  5. Step 5: Solve for x
    x = 27,308,751.55/6,987.80
  6. Step 6: Final answer
    x = 3,908.06

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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.