Home / 11,319.50-16,979.76-3,111.50

Finding the Fourth Proportional to 11,319.50, 16,979.76 and 3,111.50

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Solution

The fourth proportional to 11,319.50, 16,979.76 and 3,111.50 is: 4,667.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,319.50 : 16,979.76 = 3,111.50 : x
  2. Step 2: Convert to fraction form
    11,319.50/16,979.76 = 3,111.50/x
  3. Step 3: Cross multiply
    11,319.50x = 16,979.76 × 3,111.50
  4. Step 4: Simplify right side
    11,319.50x = 52,832,523.24
  5. Step 5: Solve for x
    x = 52,832,523.24/11,319.50
  6. Step 6: Final answer
    x = 4,667.39

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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.