Home / 12,487.05-18,724.32-4,164.21

Finding the Fourth Proportional to 12,487.05, 18,724.32 and 4,164.21

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Solution

The fourth proportional to 12,487.05, 18,724.32 and 4,164.21 is: 6,244.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.05 : 18,724.32 = 4,164.21 : x
  2. Step 2: Convert to fraction form
    12,487.05/18,724.32 = 4,164.21/x
  3. Step 3: Cross multiply
    12,487.05x = 18,724.32 × 4,164.21
  4. Step 4: Simplify right side
    12,487.05x = 77,972,000.59
  5. Step 5: Solve for x
    x = 77,972,000.59/12,487.05
  6. Step 6: Final answer
    x = 6,244.23

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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.