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Finding the Fourth Proportional to 15,677.71, 21,635.50 and 8,604.79

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Solution

The fourth proportional to 15,677.71, 21,635.50 and 8,604.79 is: 11,874.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,677.71 : 21,635.50 = 8,604.79 : x
  2. Step 2: Convert to fraction form
    15,677.71/21,635.50 = 8,604.79/x
  3. Step 3: Cross multiply
    15,677.71x = 21,635.50 × 8,604.79
  4. Step 4: Simplify right side
    15,677.71x = 186,168,934.05
  5. Step 5: Solve for x
    x = 186,168,934.05/15,677.71
  6. Step 6: Final answer
    x = 11,874.75

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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.