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Finding the Fourth Proportional to 21,901.60, 32,823.60 and 19,424.80

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Solution

The fourth proportional to 21,901.60, 32,823.60 and 19,424.80 is: 29,111.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,901.60 : 32,823.60 = 19,424.80 : x
  2. Step 2: Convert to fraction form
    21,901.60/32,823.60 = 19,424.80/x
  3. Step 3: Cross multiply
    21,901.60x = 32,823.60 × 19,424.80
  4. Step 4: Simplify right side
    21,901.60x = 637,591,865.28
  5. Step 5: Solve for x
    x = 637,591,865.28/21,901.60
  6. Step 6: Final answer
    x = 29,111.66

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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.