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Finding the Fourth Proportional to 21,803.60, 32,640.60 and 19,470.80

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Solution

The fourth proportional to 21,803.60, 32,640.60 and 19,470.80 is: 29,148.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,803.60 : 32,640.60 = 19,470.80 : x
  2. Step 2: Convert to fraction form
    21,803.60/32,640.60 = 19,470.80/x
  3. Step 3: Cross multiply
    21,803.60x = 32,640.60 × 19,470.80
  4. Step 4: Simplify right side
    21,803.60x = 635,538,594.48
  5. Step 5: Solve for x
    x = 635,538,594.48/21,803.60
  6. Step 6: Final answer
    x = 29,148.33

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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.