Home / 12,018.20-18,026.90-5,439.79

Finding the Fourth Proportional to 12,018.20, 18,026.90 and 5,439.79

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Solution

The fourth proportional to 12,018.20, 18,026.90 and 5,439.79 is: 8,159.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.20 : 18,026.90 = 5,439.79 : x
  2. Step 2: Convert to fraction form
    12,018.20/18,026.90 = 5,439.79/x
  3. Step 3: Cross multiply
    12,018.20x = 18,026.90 × 5,439.79
  4. Step 4: Simplify right side
    12,018.20x = 98,062,433.02
  5. Step 5: Solve for x
    x = 98,062,433.02/12,018.20
  6. Step 6: Final answer
    x = 8,159.49

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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.