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Finding the Fourth Proportional to 15,698.55, 21,664.41 and 8,625.16

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Solution

The fourth proportional to 15,698.55, 21,664.41 and 8,625.16 is: 11,902.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,698.55 : 21,664.41 = 8,625.16 : x
  2. Step 2: Convert to fraction form
    15,698.55/21,664.41 = 8,625.16/x
  3. Step 3: Cross multiply
    15,698.55x = 21,664.41 × 8,625.16
  4. Step 4: Simplify right side
    15,698.55x = 186,859,002.56
  5. Step 5: Solve for x
    x = 186,859,002.56/15,698.55
  6. Step 6: Final answer
    x = 11,902.95

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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.