Home / 8,688.15-11,990.13-4,911.48

Finding the Fourth Proportional to 8,688.15, 11,990.13 and 4,911.48

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Solution

The fourth proportional to 8,688.15, 11,990.13 and 4,911.48 is: 6,778.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.15 : 11,990.13 = 4,911.48 : x
  2. Step 2: Convert to fraction form
    8,688.15/11,990.13 = 4,911.48/x
  3. Step 3: Cross multiply
    8,688.15x = 11,990.13 × 4,911.48
  4. Step 4: Simplify right side
    8,688.15x = 58,889,283.69
  5. Step 5: Solve for x
    x = 58,889,283.69/8,688.15
  6. Step 6: Final answer
    x = 6,778.12

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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.