Home / 8,688.54-11,990.05-4,911.57

Finding the Fourth Proportional to 8,688.54, 11,990.05 and 4,911.57

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Solution

The fourth proportional to 8,688.54, 11,990.05 and 4,911.57 is: 6,777.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.54 : 11,990.05 = 4,911.57 : x
  2. Step 2: Convert to fraction form
    8,688.54/11,990.05 = 4,911.57/x
  3. Step 3: Cross multiply
    8,688.54x = 11,990.05 × 4,911.57
  4. Step 4: Simplify right side
    8,688.54x = 58,889,945.32
  5. Step 5: Solve for x
    x = 58,889,945.32/8,688.54
  6. Step 6: Final answer
    x = 6,777.89

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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.