Home / 12,211.29-18,319.77-5,187.78

Finding the Fourth Proportional to 12,211.29, 18,319.77 and 5,187.78

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Solution

The fourth proportional to 12,211.29, 18,319.77 and 5,187.78 is: 7,782.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.29 : 18,319.77 = 5,187.78 : x
  2. Step 2: Convert to fraction form
    12,211.29/18,319.77 = 5,187.78/x
  3. Step 3: Cross multiply
    12,211.29x = 18,319.77 × 5,187.78
  4. Step 4: Simplify right side
    12,211.29x = 95,038,936.41
  5. Step 5: Solve for x
    x = 95,038,936.41/12,211.29
  6. Step 6: Final answer
    x = 7,782.87

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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.