Home / 21,110.76-29,110.69-18,269.48

Finding the Fourth Proportional to 21,110.76, 29,110.69 and 18,269.48

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Solution

The fourth proportional to 21,110.76, 29,110.69 and 18,269.48 is: 25,192.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.76 : 29,110.69 = 18,269.48 : x
  2. Step 2: Convert to fraction form
    21,110.76/29,110.69 = 18,269.48/x
  3. Step 3: Cross multiply
    21,110.76x = 29,110.69 × 18,269.48
  4. Step 4: Simplify right side
    21,110.76x = 531,837,264.35
  5. Step 5: Solve for x
    x = 531,837,264.35/21,110.76
  6. Step 6: Final answer
    x = 25,192.71

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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.