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Finding the Fourth Proportional to 21,858.92, 32,788.38 and 10,158.47

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Solution

The fourth proportional to 21,858.92, 32,788.38 and 10,158.47 is: 15,237.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,858.92 : 32,788.38 = 10,158.47 : x
  2. Step 2: Convert to fraction form
    21,858.92/32,788.38 = 10,158.47/x
  3. Step 3: Cross multiply
    21,858.92x = 32,788.38 × 10,158.47
  4. Step 4: Simplify right side
    21,858.92x = 333,079,774.58
  5. Step 5: Solve for x
    x = 333,079,774.58/21,858.92
  6. Step 6: Final answer
    x = 15,237.71

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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.