Home / 15,111.39-20,853.30-8,396.84

Finding the Fourth Proportional to 15,111.39, 20,853.30 and 8,396.84

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Solution

The fourth proportional to 15,111.39, 20,853.30 and 8,396.84 is: 11,587.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,111.39 : 20,853.30 = 8,396.84 : x
  2. Step 2: Convert to fraction form
    15,111.39/20,853.30 = 8,396.84/x
  3. Step 3: Cross multiply
    15,111.39x = 20,853.30 × 8,396.84
  4. Step 4: Simplify right side
    15,111.39x = 175,101,781.59
  5. Step 5: Solve for x
    x = 175,101,781.59/15,111.39
  6. Step 6: Final answer
    x = 11,587.41

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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.