Home / 21,117.74-29,115.99-13,550.72

Finding the Fourth Proportional to 21,117.74, 29,115.99 and 13,550.72

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Solution

The fourth proportional to 21,117.74, 29,115.99 and 13,550.72 is: 18,682.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.74 : 29,115.99 = 13,550.72 : x
  2. Step 2: Convert to fraction form
    21,117.74/29,115.99 = 13,550.72/x
  3. Step 3: Cross multiply
    21,117.74x = 29,115.99 × 13,550.72
  4. Step 4: Simplify right side
    21,117.74x = 394,542,482.43
  5. Step 5: Solve for x
    x = 394,542,482.43/21,117.74
  6. Step 6: Final answer
    x = 18,682.99

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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.