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Finding the Fourth Proportional to 21,358.92, 29,476.80 and 11,927.82

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Solution

The fourth proportional to 21,358.92, 29,476.80 and 11,927.82 is: 16,461.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,358.92 : 29,476.80 = 11,927.82 : x
  2. Step 2: Convert to fraction form
    21,358.92/29,476.80 = 11,927.82/x
  3. Step 3: Cross multiply
    21,358.92x = 29,476.80 × 11,927.82
  4. Step 4: Simplify right side
    21,358.92x = 351,593,964.58
  5. Step 5: Solve for x
    x = 351,593,964.58/21,358.92
  6. Step 6: Final answer
    x = 16,461.22

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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.