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Finding the Fourth Proportional to 30,486.92, 42,072.11 and 17,058.20

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Solution

The fourth proportional to 30,486.92, 42,072.11 and 17,058.20 is: 23,540.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,486.92 : 42,072.11 = 17,058.20 : x
  2. Step 2: Convert to fraction form
    30,486.92/42,072.11 = 17,058.20/x
  3. Step 3: Cross multiply
    30,486.92x = 42,072.11 × 17,058.20
  4. Step 4: Simplify right side
    30,486.92x = 717,674,235.12
  5. Step 5: Solve for x
    x = 717,674,235.12/30,486.92
  6. Step 6: Final answer
    x = 23,540.40

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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.