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Finding the Fourth Proportional to 42,808.92, 64,217.16 and 11,218.92

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Solution

The fourth proportional to 42,808.92, 64,217.16 and 11,218.92 is: 16,829.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,808.92 : 64,217.16 = 11,218.92 : x
  2. Step 2: Convert to fraction form
    42,808.92/64,217.16 = 11,218.92/x
  3. Step 3: Cross multiply
    42,808.92x = 64,217.16 × 11,218.92
  4. Step 4: Simplify right side
    42,808.92x = 720,447,180.67
  5. Step 5: Solve for x
    x = 720,447,180.67/42,808.92
  6. Step 6: Final answer
    x = 16,829.37

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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.