Home / 13,929.86-19,216.45-9,218.09

Finding the Fourth Proportional to 13,929.86, 19,216.45 and 9,218.09

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Solution

The fourth proportional to 13,929.86, 19,216.45 and 9,218.09 is: 12,716.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.86 : 19,216.45 = 9,218.09 : x
  2. Step 2: Convert to fraction form
    13,929.86/19,216.45 = 9,218.09/x
  3. Step 3: Cross multiply
    13,929.86x = 19,216.45 × 9,218.09
  4. Step 4: Simplify right side
    13,929.86x = 177,138,965.58
  5. Step 5: Solve for x
    x = 177,138,965.58/13,929.86
  6. Step 6: Final answer
    x = 12,716.49

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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.