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Finding the Fourth Proportional to 21,960.40, 32,940.60 and 21,830.80

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Solution

The fourth proportional to 21,960.40, 32,940.60 and 21,830.80 is: 32,746.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.40 : 32,940.60 = 21,830.80 : x
  2. Step 2: Convert to fraction form
    21,960.40/32,940.60 = 21,830.80/x
  3. Step 3: Cross multiply
    21,960.40x = 32,940.60 × 21,830.80
  4. Step 4: Simplify right side
    21,960.40x = 719,119,650.48
  5. Step 5: Solve for x
    x = 719,119,650.48/21,960.40
  6. Step 6: Final answer
    x = 32,746.20

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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.