Home / 22,193.68-30,620-15,821.28

Finding the Fourth Proportional to 22,193.68, 30,620 and 15,821.28

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Solution

The fourth proportional to 22,193.68, 30,620 and 15,821.28 is: 21,828.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,193.68 : 30,620 = 15,821.28 : x
  2. Step 2: Convert to fraction form
    22,193.68/30,620 = 15,821.28/x
  3. Step 3: Cross multiply
    22,193.68x = 30,620 × 15,821.28
  4. Step 4: Simplify right side
    22,193.68x = 484,447,593.60
  5. Step 5: Solve for x
    x = 484,447,593.60/22,193.68
  6. Step 6: Final answer
    x = 21,828.18

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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.