Home / 21,279.35-31,859.02-11,261.41

Finding the Fourth Proportional to 21,279.35, 31,859.02 and 11,261.41

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Solution

The fourth proportional to 21,279.35, 31,859.02 and 11,261.41 is: 16,860.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.35 : 31,859.02 = 11,261.41 : x
  2. Step 2: Convert to fraction form
    21,279.35/31,859.02 = 11,261.41/x
  3. Step 3: Cross multiply
    21,279.35x = 31,859.02 × 11,261.41
  4. Step 4: Simplify right side
    21,279.35x = 358,777,420.85
  5. Step 5: Solve for x
    x = 358,777,420.85/21,279.35
  6. Step 6: Final answer
    x = 16,860.35

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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.