Home / 8,109.60-12,105.74-7,125.45

Finding the Fourth Proportional to 8,109.60, 12,105.74 and 7,125.45

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Solution

The fourth proportional to 8,109.60, 12,105.74 and 7,125.45 is: 10,636.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,109.60 : 12,105.74 = 7,125.45 : x
  2. Step 2: Convert to fraction form
    8,109.60/12,105.74 = 7,125.45/x
  3. Step 3: Cross multiply
    8,109.60x = 12,105.74 × 7,125.45
  4. Step 4: Simplify right side
    8,109.60x = 86,258,845.08
  5. Step 5: Solve for x
    x = 86,258,845.08/8,109.60
  6. Step 6: Final answer
    x = 10,636.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.