Home / 21,518.72-29,695.17-11,958.56

Finding the Fourth Proportional to 21,518.72, 29,695.17 and 11,958.56

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Solution

The fourth proportional to 21,518.72, 29,695.17 and 11,958.56 is: 16,502.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.72 : 29,695.17 = 11,958.56 : x
  2. Step 2: Convert to fraction form
    21,518.72/29,695.17 = 11,958.56/x
  3. Step 3: Cross multiply
    21,518.72x = 29,695.17 × 11,958.56
  4. Step 4: Simplify right side
    21,518.72x = 355,111,479.88
  5. Step 5: Solve for x
    x = 355,111,479.88/21,518.72
  6. Step 6: Final answer
    x = 16,502.45

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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.