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Finding the Fourth Proportional to 13,058.40, 18,029.96 and 8,029.38

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Solution

The fourth proportional to 13,058.40, 18,029.96 and 8,029.38 is: 11,086.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,058.40 : 18,029.96 = 8,029.38 : x
  2. Step 2: Convert to fraction form
    13,058.40/18,029.96 = 8,029.38/x
  3. Step 3: Cross multiply
    13,058.40x = 18,029.96 × 8,029.38
  4. Step 4: Simplify right side
    13,058.40x = 144,769,457.80
  5. Step 5: Solve for x
    x = 144,769,457.80/13,058.40
  6. Step 6: Final answer
    x = 11,086.31

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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.