Home / 21,760.11-30,031.38-12,809.82

Finding the Fourth Proportional to 21,760.11, 30,031.38 and 12,809.82

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Solution

The fourth proportional to 21,760.11, 30,031.38 and 12,809.82 is: 17,678.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,760.11 : 30,031.38 = 12,809.82 : x
  2. Step 2: Convert to fraction form
    21,760.11/30,031.38 = 12,809.82/x
  3. Step 3: Cross multiply
    21,760.11x = 30,031.38 × 12,809.82
  4. Step 4: Simplify right side
    21,760.11x = 384,696,572.15
  5. Step 5: Solve for x
    x = 384,696,572.15/21,760.11
  6. Step 6: Final answer
    x = 17,678.98

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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.