Home / 21,037.29-31,578.68-18,712.19

Finding the Fourth Proportional to 21,037.29, 31,578.68 and 18,712.19

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Solution

The fourth proportional to 21,037.29, 31,578.68 and 18,712.19 is: 28,088.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,037.29 : 31,578.68 = 18,712.19 : x
  2. Step 2: Convert to fraction form
    21,037.29/31,578.68 = 18,712.19/x
  3. Step 3: Cross multiply
    21,037.29x = 31,578.68 × 18,712.19
  4. Step 4: Simplify right side
    21,037.29x = 590,906,149.00
  5. Step 5: Solve for x
    x = 590,906,149.00/21,037.29
  6. Step 6: Final answer
    x = 28,088.51

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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.