Home / 20,983.90-28,960.28-12,031.37

Finding the Fourth Proportional to 20,983.90, 28,960.28 and 12,031.37

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Solution

The fourth proportional to 20,983.90, 28,960.28 and 12,031.37 is: 16,604.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.90 : 28,960.28 = 12,031.37 : x
  2. Step 2: Convert to fraction form
    20,983.90/28,960.28 = 12,031.37/x
  3. Step 3: Cross multiply
    20,983.90x = 28,960.28 × 12,031.37
  4. Step 4: Simplify right side
    20,983.90x = 348,431,901.35
  5. Step 5: Solve for x
    x = 348,431,901.35/20,983.90
  6. Step 6: Final answer
    x = 16,604.73

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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.