Home / 21,229.81-29,299.83-12,275.58

Finding the Fourth Proportional to 21,229.81, 29,299.83 and 12,275.58

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Solution

The fourth proportional to 21,229.81, 29,299.83 and 12,275.58 is: 16,941.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.81 : 29,299.83 = 12,275.58 : x
  2. Step 2: Convert to fraction form
    21,229.81/29,299.83 = 12,275.58/x
  3. Step 3: Cross multiply
    21,229.81x = 29,299.83 × 12,275.58
  4. Step 4: Simplify right side
    21,229.81x = 359,672,407.15
  5. Step 5: Solve for x
    x = 359,672,407.15/21,229.81
  6. Step 6: Final answer
    x = 16,941.86

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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.