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Finding the Fourth Proportional to 56,906.15, 85,340.79 and 18,945.29

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Solution

The fourth proportional to 56,906.15, 85,340.79 and 18,945.29 is: 28,411.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,906.15 : 85,340.79 = 18,945.29 : x
  2. Step 2: Convert to fraction form
    56,906.15/85,340.79 = 18,945.29/x
  3. Step 3: Cross multiply
    56,906.15x = 85,340.79 × 18,945.29
  4. Step 4: Simplify right side
    56,906.15x = 1,616,806,228.73
  5. Step 5: Solve for x
    x = 1,616,806,228.73/56,906.15
  6. Step 6: Final answer
    x = 28,411.80

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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.