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Finding the Fourth Proportional to 21,397.60, 32,096.40 and 19,210.60

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Solution

The fourth proportional to 21,397.60, 32,096.40 and 19,210.60 is: 28,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,397.60 : 32,096.40 = 19,210.60 : x
  2. Step 2: Convert to fraction form
    21,397.60/32,096.40 = 19,210.60/x
  3. Step 3: Cross multiply
    21,397.60x = 32,096.40 × 19,210.60
  4. Step 4: Simplify right side
    21,397.60x = 616,591,101.84
  5. Step 5: Solve for x
    x = 616,591,101.84/21,397.60
  6. Step 6: Final answer
    x = 28,815.90

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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.