Home / 22,154.64-30,571.56-12,721.20

Finding the Fourth Proportional to 22,154.64, 30,571.56 and 12,721.20

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Solution

The fourth proportional to 22,154.64, 30,571.56 and 12,721.20 is: 17,554.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,154.64 : 30,571.56 = 12,721.20 : x
  2. Step 2: Convert to fraction form
    22,154.64/30,571.56 = 12,721.20/x
  3. Step 3: Cross multiply
    22,154.64x = 30,571.56 × 12,721.20
  4. Step 4: Simplify right side
    22,154.64x = 388,906,929.07
  5. Step 5: Solve for x
    x = 388,906,929.07/22,154.64
  6. Step 6: Final answer
    x = 17,554.20

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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.