Home / 20,943.09-31,398.17-7,788.29

Finding the Fourth Proportional to 20,943.09, 31,398.17 and 7,788.29

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Solution

The fourth proportional to 20,943.09, 31,398.17 and 7,788.29 is: 11,676.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.09 : 31,398.17 = 7,788.29 : x
  2. Step 2: Convert to fraction form
    20,943.09/31,398.17 = 7,788.29/x
  3. Step 3: Cross multiply
    20,943.09x = 31,398.17 × 7,788.29
  4. Step 4: Simplify right side
    20,943.09x = 244,537,857.50
  5. Step 5: Solve for x
    x = 244,537,857.50/20,943.09
  6. Step 6: Final answer
    x = 11,676.30

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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.