Home / 21,086.76-29,101.38-12,135.84

Finding the Fourth Proportional to 21,086.76, 29,101.38 and 12,135.84

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Solution

The fourth proportional to 21,086.76, 29,101.38 and 12,135.84 is: 16,748.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.76 : 29,101.38 = 12,135.84 : x
  2. Step 2: Convert to fraction form
    21,086.76/29,101.38 = 12,135.84/x
  3. Step 3: Cross multiply
    21,086.76x = 29,101.38 × 12,135.84
  4. Step 4: Simplify right side
    21,086.76x = 353,169,691.46
  5. Step 5: Solve for x
    x = 353,169,691.46/21,086.76
  6. Step 6: Final answer
    x = 16,748.41

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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.