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Finding the Fourth Proportional to 13,379.40, 18,406.95 and 13,010.33

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Solution

The fourth proportional to 13,379.40, 18,406.95 and 13,010.33 is: 17,899.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.40 : 18,406.95 = 13,010.33 : x
  2. Step 2: Convert to fraction form
    13,379.40/18,406.95 = 13,010.33/x
  3. Step 3: Cross multiply
    13,379.40x = 18,406.95 × 13,010.33
  4. Step 4: Simplify right side
    13,379.40x = 239,480,401.76
  5. Step 5: Solve for x
    x = 239,480,401.76/13,379.40
  6. Step 6: Final answer
    x = 17,899.19

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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.