Home / 21,220.68-31,803.96-8,726.42

Finding the Fourth Proportional to 21,220.68, 31,803.96 and 8,726.42

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Solution

The fourth proportional to 21,220.68, 31,803.96 and 8,726.42 is: 13,078.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.68 : 31,803.96 = 8,726.42 : x
  2. Step 2: Convert to fraction form
    21,220.68/31,803.96 = 8,726.42/x
  3. Step 3: Cross multiply
    21,220.68x = 31,803.96 × 8,726.42
  4. Step 4: Simplify right side
    21,220.68x = 277,534,712.62
  5. Step 5: Solve for x
    x = 277,534,712.62/21,220.68
  6. Step 6: Final answer
    x = 13,078.50

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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.