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Finding the Fourth Proportional to 15,906.74, 21,954.53 and 9,192.65

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Solution

The fourth proportional to 15,906.74, 21,954.53 and 9,192.65 is: 12,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,906.74 : 21,954.53 = 9,192.65 : x
  2. Step 2: Convert to fraction form
    15,906.74/21,954.53 = 9,192.65/x
  3. Step 3: Cross multiply
    15,906.74x = 21,954.53 × 9,192.65
  4. Step 4: Simplify right side
    15,906.74x = 201,820,264.24
  5. Step 5: Solve for x
    x = 201,820,264.24/15,906.74
  6. Step 6: Final answer
    x = 12,687.72

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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.