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Finding the Fourth Proportional to 7,854.16, 11,775.06 and 2,921.11

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Solution

The fourth proportional to 7,854.16, 11,775.06 and 2,921.11 is: 4,379.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,854.16 : 11,775.06 = 2,921.11 : x
  2. Step 2: Convert to fraction form
    7,854.16/11,775.06 = 2,921.11/x
  3. Step 3: Cross multiply
    7,854.16x = 11,775.06 × 2,921.11
  4. Step 4: Simplify right side
    7,854.16x = 34,396,186.64
  5. Step 5: Solve for x
    x = 34,396,186.64/7,854.16
  6. Step 6: Final answer
    x = 4,379.36

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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.