Home / 8,812.60-12,155.04-5,665.78

Finding the Fourth Proportional to 8,812.60, 12,155.04 and 5,665.78

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Solution

The fourth proportional to 8,812.60, 12,155.04 and 5,665.78 is: 7,814.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.60 : 12,155.04 = 5,665.78 : x
  2. Step 2: Convert to fraction form
    8,812.60/12,155.04 = 5,665.78/x
  3. Step 3: Cross multiply
    8,812.60x = 12,155.04 × 5,665.78
  4. Step 4: Simplify right side
    8,812.60x = 68,867,782.53
  5. Step 5: Solve for x
    x = 68,867,782.53/8,812.60
  6. Step 6: Final answer
    x = 7,814.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.