Home / 8,990.51-12,408.11-5,163.66

Finding the Fourth Proportional to 8,990.51, 12,408.11 and 5,163.66

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Solution

The fourth proportional to 8,990.51, 12,408.11 and 5,163.66 is: 7,126.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.51 : 12,408.11 = 5,163.66 : x
  2. Step 2: Convert to fraction form
    8,990.51/12,408.11 = 5,163.66/x
  3. Step 3: Cross multiply
    8,990.51x = 12,408.11 × 5,163.66
  4. Step 4: Simplify right side
    8,990.51x = 64,071,235.46
  5. Step 5: Solve for x
    x = 64,071,235.46/8,990.51
  6. Step 6: Final answer
    x = 7,126.54

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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.