Home / 5,128.23-7,689.62-2,656.92

Finding the Fourth Proportional to 5,128.23, 7,689.62 and 2,656.92

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Solution

The fourth proportional to 5,128.23, 7,689.62 and 2,656.92 is: 3,983.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.23 : 7,689.62 = 2,656.92 : x
  2. Step 2: Convert to fraction form
    5,128.23/7,689.62 = 2,656.92/x
  3. Step 3: Cross multiply
    5,128.23x = 7,689.62 × 2,656.92
  4. Step 4: Simplify right side
    5,128.23x = 20,430,705.17
  5. Step 5: Solve for x
    x = 20,430,705.17/5,128.23
  6. Step 6: Final answer
    x = 3,983.97

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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.