Home / 12,879.12-19,319.76-4,113.84

Finding the Fourth Proportional to 12,879.12, 19,319.76 and 4,113.84

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Solution

The fourth proportional to 12,879.12, 19,319.76 and 4,113.84 is: 6,171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.12 : 19,319.76 = 4,113.84 : x
  2. Step 2: Convert to fraction form
    12,879.12/19,319.76 = 4,113.84/x
  3. Step 3: Cross multiply
    12,879.12x = 19,319.76 × 4,113.84
  4. Step 4: Simplify right side
    12,879.12x = 79,478,401.48
  5. Step 5: Solve for x
    x = 79,478,401.48/12,879.12
  6. Step 6: Final answer
    x = 6,171.10

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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.