Home / 15,361.92-21,195.36-12,981.60

Finding the Fourth Proportional to 15,361.92, 21,195.36 and 12,981.60

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Solution

The fourth proportional to 15,361.92, 21,195.36 and 12,981.60 is: 17,911.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,361.92 : 21,195.36 = 12,981.60 : x
  2. Step 2: Convert to fraction form
    15,361.92/21,195.36 = 12,981.60/x
  3. Step 3: Cross multiply
    15,361.92x = 21,195.36 × 12,981.60
  4. Step 4: Simplify right side
    15,361.92x = 275,149,685.38
  5. Step 5: Solve for x
    x = 275,149,685.38/15,361.92
  6. Step 6: Final answer
    x = 17,911.15

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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.