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Finding the Fourth Proportional to 15,640.84, 21,584.19 and 8,926.12

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Solution

The fourth proportional to 15,640.84, 21,584.19 and 8,926.12 is: 12,317.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,640.84 : 21,584.19 = 8,926.12 : x
  2. Step 2: Convert to fraction form
    15,640.84/21,584.19 = 8,926.12/x
  3. Step 3: Cross multiply
    15,640.84x = 21,584.19 × 8,926.12
  4. Step 4: Simplify right side
    15,640.84x = 192,663,070.04
  5. Step 5: Solve for x
    x = 192,663,070.04/15,640.84
  6. Step 6: Final answer
    x = 12,317.95

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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.