Home / 8,688.30-11,991.15-7,269.90

Finding the Fourth Proportional to 8,688.30, 11,991.15 and 7,269.90

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Solution

The fourth proportional to 8,688.30, 11,991.15 and 7,269.90 is: 10,033.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.30 : 11,991.15 = 7,269.90 : x
  2. Step 2: Convert to fraction form
    8,688.30/11,991.15 = 7,269.90/x
  3. Step 3: Cross multiply
    8,688.30x = 11,991.15 × 7,269.90
  4. Step 4: Simplify right side
    8,688.30x = 87,174,461.39
  5. Step 5: Solve for x
    x = 87,174,461.39/8,688.30
  6. Step 6: Final answer
    x = 10,033.55

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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.