Home / 21,531.44-29,715.05-12,917.94

Finding the Fourth Proportional to 21,531.44, 29,715.05 and 12,917.94

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Solution

The fourth proportional to 21,531.44, 29,715.05 and 12,917.94 is: 17,827.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.44 : 29,715.05 = 12,917.94 : x
  2. Step 2: Convert to fraction form
    21,531.44/29,715.05 = 12,917.94/x
  3. Step 3: Cross multiply
    21,531.44x = 29,715.05 × 12,917.94
  4. Step 4: Simplify right side
    21,531.44x = 383,857,168.41
  5. Step 5: Solve for x
    x = 383,857,168.41/21,531.44
  6. Step 6: Final answer
    x = 17,827.76

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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.