Home / 6,615.12-9,128.44-3,820.56

Finding the Fourth Proportional to 6,615.12, 9,128.44 and 3,820.56

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Solution

The fourth proportional to 6,615.12, 9,128.44 and 3,820.56 is: 5,272.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615.12 : 9,128.44 = 3,820.56 : x
  2. Step 2: Convert to fraction form
    6,615.12/9,128.44 = 3,820.56/x
  3. Step 3: Cross multiply
    6,615.12x = 9,128.44 × 3,820.56
  4. Step 4: Simplify right side
    6,615.12x = 34,875,752.73
  5. Step 5: Solve for x
    x = 34,875,752.73/6,615.12
  6. Step 6: Final answer
    x = 5,272.13

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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.