Home / 12,312.40-18,468.60-8,375.80

Finding the Fourth Proportional to 12,312.40, 18,468.60 and 8,375.80

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Solution

The fourth proportional to 12,312.40, 18,468.60 and 8,375.80 is: 12,563.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.40 : 18,468.60 = 8,375.80 : x
  2. Step 2: Convert to fraction form
    12,312.40/18,468.60 = 8,375.80/x
  3. Step 3: Cross multiply
    12,312.40x = 18,468.60 × 8,375.80
  4. Step 4: Simplify right side
    12,312.40x = 154,689,299.88
  5. Step 5: Solve for x
    x = 154,689,299.88/12,312.40
  6. Step 6: Final answer
    x = 12,563.70

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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.