Home / 6,688.90-9,228.81-3,999.79

Finding the Fourth Proportional to 6,688.90, 9,228.81 and 3,999.79

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Solution

The fourth proportional to 6,688.90, 9,228.81 and 3,999.79 is: 5,518.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,688.90 : 9,228.81 = 3,999.79 : x
  2. Step 2: Convert to fraction form
    6,688.90/9,228.81 = 3,999.79/x
  3. Step 3: Cross multiply
    6,688.90x = 9,228.81 × 3,999.79
  4. Step 4: Simplify right side
    6,688.90x = 36,913,301.95
  5. Step 5: Solve for x
    x = 36,913,301.95/6,688.90
  6. Step 6: Final answer
    x = 5,518.59

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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.