Home / 20,879.65-31,317.32-19,661.41

Finding the Fourth Proportional to 20,879.65, 31,317.32 and 19,661.41

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Solution

The fourth proportional to 20,879.65, 31,317.32 and 19,661.41 is: 29,490.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.65 : 31,317.32 = 19,661.41 : x
  2. Step 2: Convert to fraction form
    20,879.65/31,317.32 = 19,661.41/x
  3. Step 3: Cross multiply
    20,879.65x = 31,317.32 × 19,661.41
  4. Step 4: Simplify right side
    20,879.65x = 615,742,570.31
  5. Step 5: Solve for x
    x = 615,742,570.31/20,879.65
  6. Step 6: Final answer
    x = 29,490.08

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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.