Home / 5,128.88-7,693.47-1,618.92

Finding the Fourth Proportional to 5,128.88, 7,693.47 and 1,618.92

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Solution

The fourth proportional to 5,128.88, 7,693.47 and 1,618.92 is: 2,428.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.88 : 7,693.47 = 1,618.92 : x
  2. Step 2: Convert to fraction form
    5,128.88/7,693.47 = 1,618.92/x
  3. Step 3: Cross multiply
    5,128.88x = 7,693.47 × 1,618.92
  4. Step 4: Simplify right side
    5,128.88x = 12,455,112.45
  5. Step 5: Solve for x
    x = 12,455,112.45/5,128.88
  6. Step 6: Final answer
    x = 2,428.43

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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.