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Finding the Fourth Proportional to 21,951.60, 32,938.20 and 12,598.80

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Solution

The fourth proportional to 21,951.60, 32,938.20 and 12,598.80 is: 18,904.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.60 : 32,938.20 = 12,598.80 : x
  2. Step 2: Convert to fraction form
    21,951.60/32,938.20 = 12,598.80/x
  3. Step 3: Cross multiply
    21,951.60x = 32,938.20 × 12,598.80
  4. Step 4: Simplify right side
    21,951.60x = 414,981,794.16
  5. Step 5: Solve for x
    x = 414,981,794.16/21,951.60
  6. Step 6: Final answer
    x = 18,904.40

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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.