Home / 21,187.12-29,237.92-11,755.52

Finding the Fourth Proportional to 21,187.12, 29,237.92 and 11,755.52

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Solution

The fourth proportional to 21,187.12, 29,237.92 and 11,755.52 is: 16,222.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.12 : 29,237.92 = 11,755.52 : x
  2. Step 2: Convert to fraction form
    21,187.12/29,237.92 = 11,755.52/x
  3. Step 3: Cross multiply
    21,187.12x = 29,237.92 × 11,755.52
  4. Step 4: Simplify right side
    21,187.12x = 343,706,953.32
  5. Step 5: Solve for x
    x = 343,706,953.32/21,187.12
  6. Step 6: Final answer
    x = 16,222.45

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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.