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Finding the Fourth Proportional to 20,452.80, 30,722.40 and 19,718.40

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Solution

The fourth proportional to 20,452.80, 30,722.40 and 19,718.40 is: 29,619.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,452.80 : 30,722.40 = 19,718.40 : x
  2. Step 2: Convert to fraction form
    20,452.80/30,722.40 = 19,718.40/x
  3. Step 3: Cross multiply
    20,452.80x = 30,722.40 × 19,718.40
  4. Step 4: Simplify right side
    20,452.80x = 605,796,572.16
  5. Step 5: Solve for x
    x = 605,796,572.16/20,452.80
  6. Step 6: Final answer
    x = 29,619.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.