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Finding the Fourth Proportional to 28,858.92, 39,812.30 and 16,917.22

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Solution

The fourth proportional to 28,858.92, 39,812.30 and 16,917.22 is: 23,338.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,858.92 : 39,812.30 = 16,917.22 : x
  2. Step 2: Convert to fraction form
    28,858.92/39,812.30 = 16,917.22/x
  3. Step 3: Cross multiply
    28,858.92x = 39,812.30 × 16,917.22
  4. Step 4: Simplify right side
    28,858.92x = 673,513,437.81
  5. Step 5: Solve for x
    x = 673,513,437.81/28,858.92
  6. Step 6: Final answer
    x = 23,338.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.