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Finding the Fourth Proportional to 30,451.86, 42,021.86 and 17,020.44

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Solution

The fourth proportional to 30,451.86, 42,021.86 and 17,020.44 is: 23,487.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,451.86 : 42,021.86 = 17,020.44 : x
  2. Step 2: Convert to fraction form
    30,451.86/42,021.86 = 17,020.44/x
  3. Step 3: Cross multiply
    30,451.86x = 42,021.86 × 17,020.44
  4. Step 4: Simplify right side
    30,451.86x = 715,230,461.72
  5. Step 5: Solve for x
    x = 715,230,461.72/30,451.86
  6. Step 6: Final answer
    x = 23,487.25

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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.