Home / 12,030.91-18,040.20-6,411.78

Finding the Fourth Proportional to 12,030.91, 18,040.20 and 6,411.78

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Solution

The fourth proportional to 12,030.91, 18,040.20 and 6,411.78 is: 9,614.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,030.91 : 18,040.20 = 6,411.78 : x
  2. Step 2: Convert to fraction form
    12,030.91/18,040.20 = 6,411.78/x
  3. Step 3: Cross multiply
    12,030.91x = 18,040.20 × 6,411.78
  4. Step 4: Simplify right side
    12,030.91x = 115,669,793.56
  5. Step 5: Solve for x
    x = 115,669,793.56/12,030.91
  6. Step 6: Final answer
    x = 9,614.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.