Home / 15,790.18-21,789.60-9,821.68

Finding the Fourth Proportional to 15,790.18, 21,789.60 and 9,821.68

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Solution

The fourth proportional to 15,790.18, 21,789.60 and 9,821.68 is: 13,553.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.18 : 21,789.60 = 9,821.68 : x
  2. Step 2: Convert to fraction form
    15,790.18/21,789.60 = 9,821.68/x
  3. Step 3: Cross multiply
    15,790.18x = 21,789.60 × 9,821.68
  4. Step 4: Simplify right side
    15,790.18x = 214,010,478.53
  5. Step 5: Solve for x
    x = 214,010,478.53/15,790.18
  6. Step 6: Final answer
    x = 13,553.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.