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Finding the Fourth Proportional to 57,960.60, 86,940.90 and 18,521.70

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Solution

The fourth proportional to 57,960.60, 86,940.90 and 18,521.70 is: 27,782.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,960.60 : 86,940.90 = 18,521.70 : x
  2. Step 2: Convert to fraction form
    57,960.60/86,940.90 = 18,521.70/x
  3. Step 3: Cross multiply
    57,960.60x = 86,940.90 × 18,521.70
  4. Step 4: Simplify right side
    57,960.60x = 1,610,293,267.53
  5. Step 5: Solve for x
    x = 1,610,293,267.53/57,960.60
  6. Step 6: Final answer
    x = 27,782.55

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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.