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Finding the Fourth Proportional to 21,087, 29,097.54 and 11,654.28

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Solution

The fourth proportional to 21,087, 29,097.54 and 11,654.28 is: 16,081.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087 : 29,097.54 = 11,654.28 : x
  2. Step 2: Convert to fraction form
    21,087/29,097.54 = 11,654.28/x
  3. Step 3: Cross multiply
    21,087x = 29,097.54 × 11,654.28
  4. Step 4: Simplify right side
    21,087x = 339,110,878.47
  5. Step 5: Solve for x
    x = 339,110,878.47/21,087
  6. Step 6: Final answer
    x = 16,081.51

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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.