Home / 10,431.18-15,647.18-2,640.20

Finding the Fourth Proportional to 10,431.18, 15,647.18 and 2,640.20

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Solution

The fourth proportional to 10,431.18, 15,647.18 and 2,640.20 is: 3,960.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,431.18 : 15,647.18 = 2,640.20 : x
  2. Step 2: Convert to fraction form
    10,431.18/15,647.18 = 2,640.20/x
  3. Step 3: Cross multiply
    10,431.18x = 15,647.18 × 2,640.20
  4. Step 4: Simplify right side
    10,431.18x = 41,311,593.20
  5. Step 5: Solve for x
    x = 41,311,593.20/10,431.18
  6. Step 6: Final answer
    x = 3,960.40

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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.