Home / 10,845.10-16,279.80-8,390.80

Finding the Fourth Proportional to 10,845.10, 16,279.80 and 8,390.80

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Solution

The fourth proportional to 10,845.10, 16,279.80 and 8,390.80 is: 12,595.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,845.10 : 16,279.80 = 8,390.80 : x
  2. Step 2: Convert to fraction form
    10,845.10/16,279.80 = 8,390.80/x
  3. Step 3: Cross multiply
    10,845.10x = 16,279.80 × 8,390.80
  4. Step 4: Simplify right side
    10,845.10x = 136,600,545.84
  5. Step 5: Solve for x
    x = 136,600,545.84/10,845.10
  6. Step 6: Final answer
    x = 12,595.60

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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.