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Finding the Fourth Proportional to 21,274.65, 29,358.23 and 11,843.01

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Solution

The fourth proportional to 21,274.65, 29,358.23 and 11,843.01 is: 16,342.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.65 : 29,358.23 = 11,843.01 : x
  2. Step 2: Convert to fraction form
    21,274.65/29,358.23 = 11,843.01/x
  3. Step 3: Cross multiply
    21,274.65x = 29,358.23 × 11,843.01
  4. Step 4: Simplify right side
    21,274.65x = 347,689,752.26
  5. Step 5: Solve for x
    x = 347,689,752.26/21,274.65
  6. Step 6: Final answer
    x = 16,342.91

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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.