Home / 20,538.15-28,342.74-11,106.79

Finding the Fourth Proportional to 20,538.15, 28,342.74 and 11,106.79

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Solution

The fourth proportional to 20,538.15, 28,342.74 and 11,106.79 is: 15,327.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.15 : 28,342.74 = 11,106.79 : x
  2. Step 2: Convert to fraction form
    20,538.15/28,342.74 = 11,106.79/x
  3. Step 3: Cross multiply
    20,538.15x = 28,342.74 × 11,106.79
  4. Step 4: Simplify right side
    20,538.15x = 314,796,805.67
  5. Step 5: Solve for x
    x = 314,796,805.67/20,538.15
  6. Step 6: Final answer
    x = 15,327.42

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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.