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Finding the Fourth Proportional to 6,987.84, 9,643.24 and 3,801.13

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Solution

The fourth proportional to 6,987.84, 9,643.24 and 3,801.13 is: 5,245.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.84 : 9,643.24 = 3,801.13 : x
  2. Step 2: Convert to fraction form
    6,987.84/9,643.24 = 3,801.13/x
  3. Step 3: Cross multiply
    6,987.84x = 9,643.24 × 3,801.13
  4. Step 4: Simplify right side
    6,987.84x = 36,655,199.36
  5. Step 5: Solve for x
    x = 36,655,199.36/6,987.84
  6. Step 6: Final answer
    x = 5,245.57

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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.