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Finding the Fourth Proportional to 7,163.69, 9,885.86 and 4,019.88

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Solution

The fourth proportional to 7,163.69, 9,885.86 and 4,019.88 is: 5,547.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,163.69 : 9,885.86 = 4,019.88 : x
  2. Step 2: Convert to fraction form
    7,163.69/9,885.86 = 4,019.88/x
  3. Step 3: Cross multiply
    7,163.69x = 9,885.86 × 4,019.88
  4. Step 4: Simplify right side
    7,163.69x = 39,739,970.90
  5. Step 5: Solve for x
    x = 39,739,970.90/7,163.69
  6. Step 6: Final answer
    x = 5,547.42

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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.