Home / 12,612.70-18,921.35-4,292.29

Finding the Fourth Proportional to 12,612.70, 18,921.35 and 4,292.29

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Solution

The fourth proportional to 12,612.70, 18,921.35 and 4,292.29 is: 6,439.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.70 : 18,921.35 = 4,292.29 : x
  2. Step 2: Convert to fraction form
    12,612.70/18,921.35 = 4,292.29/x
  3. Step 3: Cross multiply
    12,612.70x = 18,921.35 × 4,292.29
  4. Step 4: Simplify right side
    12,612.70x = 81,215,921.39
  5. Step 5: Solve for x
    x = 81,215,921.39/12,612.70
  6. Step 6: Final answer
    x = 6,439.22

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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.