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Finding the Fourth Proportional to 21,098.48, 29,103.72 and 13,646.48

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Solution

The fourth proportional to 21,098.48, 29,103.72 and 13,646.48 is: 18,824.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,098.48 : 29,103.72 = 13,646.48 : x
  2. Step 2: Convert to fraction form
    21,098.48/29,103.72 = 13,646.48/x
  3. Step 3: Cross multiply
    21,098.48x = 29,103.72 × 13,646.48
  4. Step 4: Simplify right side
    21,098.48x = 397,163,332.91
  5. Step 5: Solve for x
    x = 397,163,332.91/21,098.48
  6. Step 6: Final answer
    x = 18,824.26

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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.