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Finding the Fourth Proportional to 6,604.75, 9,907.13 and 1,987.75

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Solution

The fourth proportional to 6,604.75, 9,907.13 and 1,987.75 is: 2,981.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,604.75 : 9,907.13 = 1,987.75 : x
  2. Step 2: Convert to fraction form
    6,604.75/9,907.13 = 1,987.75/x
  3. Step 3: Cross multiply
    6,604.75x = 9,907.13 × 1,987.75
  4. Step 4: Simplify right side
    6,604.75x = 19,692,897.66
  5. Step 5: Solve for x
    x = 19,692,897.66/6,604.75
  6. Step 6: Final answer
    x = 2,981.63

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Double scale
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Similar ratio
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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.