Home / 20,310.66-28,031.91-12,355.38

Finding the Fourth Proportional to 20,310.66, 28,031.91 and 12,355.38

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Solution

The fourth proportional to 20,310.66, 28,031.91 and 12,355.38 is: 17,052.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,310.66 : 28,031.91 = 12,355.38 : x
  2. Step 2: Convert to fraction form
    20,310.66/28,031.91 = 12,355.38/x
  3. Step 3: Cross multiply
    20,310.66x = 28,031.91 × 12,355.38
  4. Step 4: Simplify right side
    20,310.66x = 346,344,900.18
  5. Step 5: Solve for x
    x = 346,344,900.18/20,310.66
  6. Step 6: Final answer
    x = 17,052.37

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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.