Home / 11,125.80-16,688.70-6,978.60

Finding the Fourth Proportional to 11,125.80, 16,688.70 and 6,978.60

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Solution

The fourth proportional to 11,125.80, 16,688.70 and 6,978.60 is: 10,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,125.80 : 16,688.70 = 6,978.60 : x
  2. Step 2: Convert to fraction form
    11,125.80/16,688.70 = 6,978.60/x
  3. Step 3: Cross multiply
    11,125.80x = 16,688.70 × 6,978.60
  4. Step 4: Simplify right side
    11,125.80x = 116,463,761.82
  5. Step 5: Solve for x
    x = 116,463,761.82/11,125.80
  6. Step 6: Final answer
    x = 10,467.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.