Home / 20,879.36-31,327.24-9,184.38

Finding the Fourth Proportional to 20,879.36, 31,327.24 and 9,184.38

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Solution

The fourth proportional to 20,879.36, 31,327.24 and 9,184.38 is: 13,780.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.36 : 31,327.24 = 9,184.38 : x
  2. Step 2: Convert to fraction form
    20,879.36/31,327.24 = 9,184.38/x
  3. Step 3: Cross multiply
    20,879.36x = 31,327.24 × 9,184.38
  4. Step 4: Simplify right side
    20,879.36x = 287,721,276.51
  5. Step 5: Solve for x
    x = 287,721,276.51/20,879.36
  6. Step 6: Final answer
    x = 13,780.18

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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.