Home / 21,107.86-31,669.38-9,873.24

Finding the Fourth Proportional to 21,107.86, 31,669.38 and 9,873.24

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Solution

The fourth proportional to 21,107.86, 31,669.38 and 9,873.24 is: 14,813.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.86 : 31,669.38 = 9,873.24 : x
  2. Step 2: Convert to fraction form
    21,107.86/31,669.38 = 9,873.24/x
  3. Step 3: Cross multiply
    21,107.86x = 31,669.38 × 9,873.24
  4. Step 4: Simplify right side
    21,107.86x = 312,679,389.39
  5. Step 5: Solve for x
    x = 312,679,389.39/21,107.86
  6. Step 6: Final answer
    x = 14,813.41

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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.