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Finding the Fourth Proportional to 57,946.60, 86,919.90 and 21,005.80

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Solution

The fourth proportional to 57,946.60, 86,919.90 and 21,005.80 is: 31,508.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,946.60 : 86,919.90 = 21,005.80 : x
  2. Step 2: Convert to fraction form
    57,946.60/86,919.90 = 21,005.80/x
  3. Step 3: Cross multiply
    57,946.60x = 86,919.90 × 21,005.80
  4. Step 4: Simplify right side
    57,946.60x = 1,825,822,035.42
  5. Step 5: Solve for x
    x = 1,825,822,035.42/57,946.60
  6. Step 6: Final answer
    x = 31,508.70

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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.