Home / 21,315.60-29,414.88-11,885.76

Finding the Fourth Proportional to 21,315.60, 29,414.88 and 11,885.76

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Solution

The fourth proportional to 21,315.60, 29,414.88 and 11,885.76 is: 16,401.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.60 : 29,414.88 = 11,885.76 : x
  2. Step 2: Convert to fraction form
    21,315.60/29,414.88 = 11,885.76/x
  3. Step 3: Cross multiply
    21,315.60x = 29,414.88 × 11,885.76
  4. Step 4: Simplify right side
    21,315.60x = 349,618,204.11
  5. Step 5: Solve for x
    x = 349,618,204.11/21,315.60
  6. Step 6: Final answer
    x = 16,401.99

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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.