Home / 12,143.32-18,207.44-5,119.72

Finding the Fourth Proportional to 12,143.32, 18,207.44 and 5,119.72

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Solution

The fourth proportional to 12,143.32, 18,207.44 and 5,119.72 is: 7,676.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.32 : 18,207.44 = 5,119.72 : x
  2. Step 2: Convert to fraction form
    12,143.32/18,207.44 = 5,119.72/x
  3. Step 3: Cross multiply
    12,143.32x = 18,207.44 × 5,119.72
  4. Step 4: Simplify right side
    12,143.32x = 93,216,994.72
  5. Step 5: Solve for x
    x = 93,216,994.72/12,143.32
  6. Step 6: Final answer
    x = 7,676.40

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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.