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Finding the Fourth Proportional to 57,863.86, 86,795.79 and 18,421

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Solution

The fourth proportional to 57,863.86, 86,795.79 and 18,421 is: 27,631.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,863.86 : 86,795.79 = 18,421 : x
  2. Step 2: Convert to fraction form
    57,863.86/86,795.79 = 18,421/x
  3. Step 3: Cross multiply
    57,863.86x = 86,795.79 × 18,421
  4. Step 4: Simplify right side
    57,863.86x = 1,598,865,247.59
  5. Step 5: Solve for x
    x = 1,598,865,247.59/57,863.86
  6. Step 6: Final answer
    x = 27,631.50

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Similar ratio
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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.