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Finding the Fourth Proportional to 21,666.05, 29,913.05 and 17,696.69

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Solution

The fourth proportional to 21,666.05, 29,913.05 and 17,696.69 is: 24,432.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.05 : 29,913.05 = 17,696.69 : x
  2. Step 2: Convert to fraction form
    21,666.05/29,913.05 = 17,696.69/x
  3. Step 3: Cross multiply
    21,666.05x = 29,913.05 × 17,696.69
  4. Step 4: Simplify right side
    21,666.05x = 529,361,884.32
  5. Step 5: Solve for x
    x = 529,361,884.32/21,666.05
  6. Step 6: Final answer
    x = 24,432.78

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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.