Home / 12,210.86-18,317.18-5,190.08

Finding the Fourth Proportional to 12,210.86, 18,317.18 and 5,190.08

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Solution

The fourth proportional to 12,210.86, 18,317.18 and 5,190.08 is: 7,785.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.86 : 18,317.18 = 5,190.08 : x
  2. Step 2: Convert to fraction form
    12,210.86/18,317.18 = 5,190.08/x
  3. Step 3: Cross multiply
    12,210.86x = 18,317.18 × 5,190.08
  4. Step 4: Simplify right side
    12,210.86x = 95,067,550.96
  5. Step 5: Solve for x
    x = 95,067,550.96/12,210.86
  6. Step 6: Final answer
    x = 7,785.49

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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.