Home / 21,122.89-29,161.16-14,418.52

Finding the Fourth Proportional to 21,122.89, 29,161.16 and 14,418.52

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Solution

The fourth proportional to 21,122.89, 29,161.16 and 14,418.52 is: 19,905.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.89 : 29,161.16 = 14,418.52 : x
  2. Step 2: Convert to fraction form
    21,122.89/29,161.16 = 14,418.52/x
  3. Step 3: Cross multiply
    21,122.89x = 29,161.16 × 14,418.52
  4. Step 4: Simplify right side
    21,122.89x = 420,460,768.68
  5. Step 5: Solve for x
    x = 420,460,768.68/21,122.89
  6. Step 6: Final answer
    x = 19,905.46

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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.