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Finding the Fourth Proportional to 21,624, 29,841.28 and 13,246.08

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Solution

The fourth proportional to 21,624, 29,841.28 and 13,246.08 is: 18,279.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,624 : 29,841.28 = 13,246.08 : x
  2. Step 2: Convert to fraction form
    21,624/29,841.28 = 13,246.08/x
  3. Step 3: Cross multiply
    21,624x = 29,841.28 × 13,246.08
  4. Step 4: Simplify right side
    21,624x = 395,279,982.18
  5. Step 5: Solve for x
    x = 395,279,982.18/21,624
  6. Step 6: Final answer
    x = 18,279.69

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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.