Home / 5,128.16-7,691.40-1,840.64

Finding the Fourth Proportional to 5,128.16, 7,691.40 and 1,840.64

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Solution

The fourth proportional to 5,128.16, 7,691.40 and 1,840.64 is: 2,760.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.16 : 7,691.40 = 1,840.64 : x
  2. Step 2: Convert to fraction form
    5,128.16/7,691.40 = 1,840.64/x
  3. Step 3: Cross multiply
    5,128.16x = 7,691.40 × 1,840.64
  4. Step 4: Simplify right side
    5,128.16x = 14,157,098.50
  5. Step 5: Solve for x
    x = 14,157,098.50/5,128.16
  6. Step 6: Final answer
    x = 2,760.66

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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.