Home / 12,891.30-19,331.55-4,123.86

Finding the Fourth Proportional to 12,891.30, 19,331.55 and 4,123.86

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Solution

The fourth proportional to 12,891.30, 19,331.55 and 4,123.86 is: 6,184.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.30 : 19,331.55 = 4,123.86 : x
  2. Step 2: Convert to fraction form
    12,891.30/19,331.55 = 4,123.86/x
  3. Step 3: Cross multiply
    12,891.30x = 19,331.55 × 4,123.86
  4. Step 4: Simplify right side
    12,891.30x = 79,720,605.78
  5. Step 5: Solve for x
    x = 79,720,605.78/12,891.30
  6. Step 6: Final answer
    x = 6,184.06

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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.