Home / 15,021.39-20,730.83-8,308.11

Finding the Fourth Proportional to 15,021.39, 20,730.83 and 8,308.11

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Solution

The fourth proportional to 15,021.39, 20,730.83 and 8,308.11 is: 11,465.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.39 : 20,730.83 = 8,308.11 : x
  2. Step 2: Convert to fraction form
    15,021.39/20,730.83 = 8,308.11/x
  3. Step 3: Cross multiply
    15,021.39x = 20,730.83 × 8,308.11
  4. Step 4: Simplify right side
    15,021.39x = 172,233,974.49
  5. Step 5: Solve for x
    x = 172,233,974.49/15,021.39
  6. Step 6: Final answer
    x = 11,465.91

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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.