Home / 12,111.76-18,169.80-4,720.24

Finding the Fourth Proportional to 12,111.76, 18,169.80 and 4,720.24

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Solution

The fourth proportional to 12,111.76, 18,169.80 and 4,720.24 is: 7,081.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,111.76 : 18,169.80 = 4,720.24 : x
  2. Step 2: Convert to fraction form
    12,111.76/18,169.80 = 4,720.24/x
  3. Step 3: Cross multiply
    12,111.76x = 18,169.80 × 4,720.24
  4. Step 4: Simplify right side
    12,111.76x = 85,765,816.75
  5. Step 5: Solve for x
    x = 85,765,816.75/12,111.76
  6. Step 6: Final answer
    x = 7,081.20

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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.