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Finding the Fourth Proportional to 7,216.79, 10,808.15 and 5,645.79

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Solution

The fourth proportional to 7,216.79, 10,808.15 and 5,645.79 is: 8,455.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,216.79 : 10,808.15 = 5,645.79 : x
  2. Step 2: Convert to fraction form
    7,216.79/10,808.15 = 5,645.79/x
  3. Step 3: Cross multiply
    7,216.79x = 10,808.15 × 5,645.79
  4. Step 4: Simplify right side
    7,216.79x = 61,020,516.96
  5. Step 5: Solve for x
    x = 61,020,516.96/7,216.79
  6. Step 6: Final answer
    x = 8,455.36

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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.