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Finding the Fourth Proportional to 30,989.01, 42,764.86 and 16,841.86

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Solution

The fourth proportional to 30,989.01, 42,764.86 and 16,841.86 is: 23,241.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,989.01 : 42,764.86 = 16,841.86 : x
  2. Step 2: Convert to fraction form
    30,989.01/42,764.86 = 16,841.86/x
  3. Step 3: Cross multiply
    30,989.01x = 42,764.86 × 16,841.86
  4. Step 4: Simplify right side
    30,989.01x = 720,239,699.18
  5. Step 5: Solve for x
    x = 720,239,699.18/30,989.01
  6. Step 6: Final answer
    x = 23,241.78

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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.