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Finding the Fourth Proportional to 21,043.30, 29,042.90 and 13,498.14

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Solution

The fourth proportional to 21,043.30, 29,042.90 and 13,498.14 is: 18,629.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.30 : 29,042.90 = 13,498.14 : x
  2. Step 2: Convert to fraction form
    21,043.30/29,042.90 = 13,498.14/x
  3. Step 3: Cross multiply
    21,043.30x = 29,042.90 × 13,498.14
  4. Step 4: Simplify right side
    21,043.30x = 392,025,130.21
  5. Step 5: Solve for x
    x = 392,025,130.21/21,043.30
  6. Step 6: Final answer
    x = 18,629.45

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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.