Home / 21,309.93-29,408.10-11,877.48

Finding the Fourth Proportional to 21,309.93, 29,408.10 and 11,877.48

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Solution

The fourth proportional to 21,309.93, 29,408.10 and 11,877.48 is: 16,391.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.93 : 29,408.10 = 11,877.48 : x
  2. Step 2: Convert to fraction form
    21,309.93/29,408.10 = 11,877.48/x
  3. Step 3: Cross multiply
    21,309.93x = 29,408.10 × 11,877.48
  4. Step 4: Simplify right side
    21,309.93x = 349,294,060.20
  5. Step 5: Solve for x
    x = 349,294,060.20/21,309.93
  6. Step 6: Final answer
    x = 16,391.14

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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.