Home / 8,912.61-12,299.12-5,135.79

Finding the Fourth Proportional to 8,912.61, 12,299.12 and 5,135.79

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Solution

The fourth proportional to 8,912.61, 12,299.12 and 5,135.79 is: 7,087.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,912.61 : 12,299.12 = 5,135.79 : x
  2. Step 2: Convert to fraction form
    8,912.61/12,299.12 = 5,135.79/x
  3. Step 3: Cross multiply
    8,912.61x = 12,299.12 × 5,135.79
  4. Step 4: Simplify right side
    8,912.61x = 63,165,697.50
  5. Step 5: Solve for x
    x = 63,165,697.50/8,912.61
  6. Step 6: Final answer
    x = 7,087.23

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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.