Home / 20,313.17-28,031.34-11,815.53

Finding the Fourth Proportional to 20,313.17, 28,031.34 and 11,815.53

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Solution

The fourth proportional to 20,313.17, 28,031.34 and 11,815.53 is: 16,304.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,313.17 : 28,031.34 = 11,815.53 : x
  2. Step 2: Convert to fraction form
    20,313.17/28,031.34 = 11,815.53/x
  3. Step 3: Cross multiply
    20,313.17x = 28,031.34 × 11,815.53
  4. Step 4: Simplify right side
    20,313.17x = 331,205,243.83
  5. Step 5: Solve for x
    x = 331,205,243.83/20,313.17
  6. Step 6: Final answer
    x = 16,304.95

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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.