Home / 8,688.60-11,991.51-4,912.92

Finding the Fourth Proportional to 8,688.60, 11,991.51 and 4,912.92

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Solution

The fourth proportional to 8,688.60, 11,991.51 and 4,912.92 is: 6,780.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.60 : 11,991.51 = 4,912.92 : x
  2. Step 2: Convert to fraction form
    8,688.60/11,991.51 = 4,912.92/x
  3. Step 3: Cross multiply
    8,688.60x = 11,991.51 × 4,912.92
  4. Step 4: Simplify right side
    8,688.60x = 58,913,329.31
  5. Step 5: Solve for x
    x = 58,913,329.31/8,688.60
  6. Step 6: Final answer
    x = 6,780.53

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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.