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Finding the Fourth Proportional to 5,775.12, 8,661.60 and 2,489.76

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Solution

The fourth proportional to 5,775.12, 8,661.60 and 2,489.76 is: 3,734.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,775.12 : 8,661.60 = 2,489.76 : x
  2. Step 2: Convert to fraction form
    5,775.12/8,661.60 = 2,489.76/x
  3. Step 3: Cross multiply
    5,775.12x = 8,661.60 × 2,489.76
  4. Step 4: Simplify right side
    5,775.12x = 21,565,305.22
  5. Step 5: Solve for x
    x = 21,565,305.22/5,775.12
  6. Step 6: Final answer
    x = 3,734.17

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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.