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Finding the Fourth Proportional to 21,652.69, 29,880.80 and 11,716.69

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Solution

The fourth proportional to 21,652.69, 29,880.80 and 11,716.69 is: 16,169.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,652.69 : 29,880.80 = 11,716.69 : x
  2. Step 2: Convert to fraction form
    21,652.69/29,880.80 = 11,716.69/x
  3. Step 3: Cross multiply
    21,652.69x = 29,880.80 × 11,716.69
  4. Step 4: Simplify right side
    21,652.69x = 350,103,981.20
  5. Step 5: Solve for x
    x = 350,103,981.20/21,652.69
  6. Step 6: Final answer
    x = 16,169.08

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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.