Home / 8,431.40-12,655.20-4,276.10

Finding the Fourth Proportional to 8,431.40, 12,655.20 and 4,276.10

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Solution

The fourth proportional to 8,431.40, 12,655.20 and 4,276.10 is: 6,418.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.40 : 12,655.20 = 4,276.10 : x
  2. Step 2: Convert to fraction form
    8,431.40/12,655.20 = 4,276.10/x
  3. Step 3: Cross multiply
    8,431.40x = 12,655.20 × 4,276.10
  4. Step 4: Simplify right side
    8,431.40x = 54,114,900.72
  5. Step 5: Solve for x
    x = 54,114,900.72/8,431.40
  6. Step 6: Final answer
    x = 6,418.26

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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.