Home / 8,420.36-11,619.45-5,768.42

Finding the Fourth Proportional to 8,420.36, 11,619.45 and 5,768.42

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Solution

The fourth proportional to 8,420.36, 11,619.45 and 5,768.42 is: 7,959.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.36 : 11,619.45 = 5,768.42 : x
  2. Step 2: Convert to fraction form
    8,420.36/11,619.45 = 5,768.42/x
  3. Step 3: Cross multiply
    8,420.36x = 11,619.45 × 5,768.42
  4. Step 4: Simplify right side
    8,420.36x = 67,025,809.67
  5. Step 5: Solve for x
    x = 67,025,809.67/8,420.36
  6. Step 6: Final answer
    x = 7,959.97

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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.