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Finding the Fourth Proportional to 21,718.80, 32,578.20 and 10,627.20

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Solution

The fourth proportional to 21,718.80, 32,578.20 and 10,627.20 is: 15,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,718.80 : 32,578.20 = 10,627.20 : x
  2. Step 2: Convert to fraction form
    21,718.80/32,578.20 = 10,627.20/x
  3. Step 3: Cross multiply
    21,718.80x = 32,578.20 × 10,627.20
  4. Step 4: Simplify right side
    21,718.80x = 346,215,047.04
  5. Step 5: Solve for x
    x = 346,215,047.04/21,718.80
  6. Step 6: Final answer
    x = 15,940.80

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Similar ratio
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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.