Home / 8,390.20-12,593.40-5,109.70

Finding the Fourth Proportional to 8,390.20, 12,593.40 and 5,109.70

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Solution

The fourth proportional to 8,390.20, 12,593.40 and 5,109.70 is: 7,669.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.20 : 12,593.40 = 5,109.70 : x
  2. Step 2: Convert to fraction form
    8,390.20/12,593.40 = 5,109.70/x
  3. Step 3: Cross multiply
    8,390.20x = 12,593.40 × 5,109.70
  4. Step 4: Simplify right side
    8,390.20x = 64,348,495.98
  5. Step 5: Solve for x
    x = 64,348,495.98/8,390.20
  6. Step 6: Final answer
    x = 7,669.48

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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.