Home / 8,665.20-11,955.60-5,518.80

Finding the Fourth Proportional to 8,665.20, 11,955.60 and 5,518.80

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Solution

The fourth proportional to 8,665.20, 11,955.60 and 5,518.80 is: 7,614.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.20 : 11,955.60 = 5,518.80 : x
  2. Step 2: Convert to fraction form
    8,665.20/11,955.60 = 5,518.80/x
  3. Step 3: Cross multiply
    8,665.20x = 11,955.60 × 5,518.80
  4. Step 4: Simplify right side
    8,665.20x = 65,980,565.28
  5. Step 5: Solve for x
    x = 65,980,565.28/8,665.20
  6. Step 6: Final answer
    x = 7,614.43

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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.