Home / 21,686.92-32,436.60-12,781.12

Finding the Fourth Proportional to 21,686.92, 32,436.60 and 12,781.12

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Solution

The fourth proportional to 21,686.92, 32,436.60 and 12,781.12 is: 19,116.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.92 : 32,436.60 = 12,781.12 : x
  2. Step 2: Convert to fraction form
    21,686.92/32,436.60 = 12,781.12/x
  3. Step 3: Cross multiply
    21,686.92x = 32,436.60 × 12,781.12
  4. Step 4: Simplify right side
    21,686.92x = 414,576,076.99
  5. Step 5: Solve for x
    x = 414,576,076.99/21,686.92
  6. Step 6: Final answer
    x = 19,116.41

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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.