Home / 15,113.82-20,857.19-8,400.08

Finding the Fourth Proportional to 15,113.82, 20,857.19 and 8,400.08

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Solution

The fourth proportional to 15,113.82, 20,857.19 and 8,400.08 is: 11,592.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.82 : 20,857.19 = 8,400.08 : x
  2. Step 2: Convert to fraction form
    15,113.82/20,857.19 = 8,400.08/x
  3. Step 3: Cross multiply
    15,113.82x = 20,857.19 × 8,400.08
  4. Step 4: Simplify right side
    15,113.82x = 175,202,064.58
  5. Step 5: Solve for x
    x = 175,202,064.58/15,113.82
  6. Step 6: Final answer
    x = 11,592.18

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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.