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Finding the Fourth Proportional to 7,745.79, 10,689.16 and 4,209.03

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Solution

The fourth proportional to 7,745.79, 10,689.16 and 4,209.03 is: 5,808.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,745.79 : 10,689.16 = 4,209.03 : x
  2. Step 2: Convert to fraction form
    7,745.79/10,689.16 = 4,209.03/x
  3. Step 3: Cross multiply
    7,745.79x = 10,689.16 × 4,209.03
  4. Step 4: Simplify right side
    7,745.79x = 44,990,995.11
  5. Step 5: Solve for x
    x = 44,990,995.11/7,745.79
  6. Step 6: Final answer
    x = 5,808.44

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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.