Home / 12,886.26-19,331.40-5,490.75

Finding the Fourth Proportional to 12,886.26, 19,331.40 and 5,490.75

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Solution

The fourth proportional to 12,886.26, 19,331.40 and 5,490.75 is: 8,236.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,886.26 : 19,331.40 = 5,490.75 : x
  2. Step 2: Convert to fraction form
    12,886.26/19,331.40 = 5,490.75/x
  3. Step 3: Cross multiply
    12,886.26x = 19,331.40 × 5,490.75
  4. Step 4: Simplify right side
    12,886.26x = 106,143,884.55
  5. Step 5: Solve for x
    x = 106,143,884.55/12,886.26
  6. Step 6: Final answer
    x = 8,236.98

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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.