Home / 5,518.47-7,615.32-3,128.66

Finding the Fourth Proportional to 5,518.47, 7,615.32 and 3,128.66

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Solution

The fourth proportional to 5,518.47, 7,615.32 and 3,128.66 is: 4,317.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,518.47 : 7,615.32 = 3,128.66 : x
  2. Step 2: Convert to fraction form
    5,518.47/7,615.32 = 3,128.66/x
  3. Step 3: Cross multiply
    5,518.47x = 7,615.32 × 3,128.66
  4. Step 4: Simplify right side
    5,518.47x = 23,825,712.39
  5. Step 5: Solve for x
    x = 23,825,712.39/5,518.47
  6. Step 6: Final answer
    x = 4,317.45

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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.