Home / 21,669.40-29,874.12-13,707.64

Finding the Fourth Proportional to 21,669.40, 29,874.12 and 13,707.64

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Solution

The fourth proportional to 21,669.40, 29,874.12 and 13,707.64 is: 18,897.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,669.40 : 29,874.12 = 13,707.64 : x
  2. Step 2: Convert to fraction form
    21,669.40/29,874.12 = 13,707.64/x
  3. Step 3: Cross multiply
    21,669.40x = 29,874.12 × 13,707.64
  4. Step 4: Simplify right side
    21,669.40x = 409,503,682.28
  5. Step 5: Solve for x
    x = 409,503,682.28/21,669.40
  6. Step 6: Final answer
    x = 18,897.79

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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.