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Finding the Fourth Proportional to 6,987.55, 9,642.09 and 4,003.51

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Solution

The fourth proportional to 6,987.55, 9,642.09 and 4,003.51 is: 5,524.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.55 : 9,642.09 = 4,003.51 : x
  2. Step 2: Convert to fraction form
    6,987.55/9,642.09 = 4,003.51/x
  3. Step 3: Cross multiply
    6,987.55x = 9,642.09 × 4,003.51
  4. Step 4: Simplify right side
    6,987.55x = 38,602,203.74
  5. Step 5: Solve for x
    x = 38,602,203.74/6,987.55
  6. Step 6: Final answer
    x = 5,524.43

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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.