Home / 21,476.39-29,635.92-11,915.87

Finding the Fourth Proportional to 21,476.39, 29,635.92 and 11,915.87

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Solution

The fourth proportional to 21,476.39, 29,635.92 and 11,915.87 is: 16,443.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,476.39 : 29,635.92 = 11,915.87 : x
  2. Step 2: Convert to fraction form
    21,476.39/29,635.92 = 11,915.87/x
  3. Step 3: Cross multiply
    21,476.39x = 29,635.92 × 11,915.87
  4. Step 4: Simplify right side
    21,476.39x = 353,137,621.87
  5. Step 5: Solve for x
    x = 353,137,621.87/21,476.39
  6. Step 6: Final answer
    x = 16,443.07

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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.