Home / 21,781.23-32,686.38-7,930.23

Finding the Fourth Proportional to 21,781.23, 32,686.38 and 7,930.23

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Solution

The fourth proportional to 21,781.23, 32,686.38 and 7,930.23 is: 11,900.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,781.23 : 32,686.38 = 7,930.23 : x
  2. Step 2: Convert to fraction form
    21,781.23/32,686.38 = 7,930.23/x
  3. Step 3: Cross multiply
    21,781.23x = 32,686.38 × 7,930.23
  4. Step 4: Simplify right side
    21,781.23x = 259,210,511.27
  5. Step 5: Solve for x
    x = 259,210,511.27/21,781.23
  6. Step 6: Final answer
    x = 11,900.64

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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.