Home / 12,390.85-18,572.23-6,143.05

Finding the Fourth Proportional to 12,390.85, 18,572.23 and 6,143.05

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Solution

The fourth proportional to 12,390.85, 18,572.23 and 6,143.05 is: 9,207.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.85 : 18,572.23 = 6,143.05 : x
  2. Step 2: Convert to fraction form
    12,390.85/18,572.23 = 6,143.05/x
  3. Step 3: Cross multiply
    12,390.85x = 18,572.23 × 6,143.05
  4. Step 4: Simplify right side
    12,390.85x = 114,090,137.50
  5. Step 5: Solve for x
    x = 114,090,137.50/12,390.85
  6. Step 6: Final answer
    x = 9,207.61

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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.