Home / 20,439.48-30,640.66-18,225.14

Finding the Fourth Proportional to 20,439.48, 30,640.66 and 18,225.14

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Solution

The fourth proportional to 20,439.48, 30,640.66 and 18,225.14 is: 27,321.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.48 : 30,640.66 = 18,225.14 : x
  2. Step 2: Convert to fraction form
    20,439.48/30,640.66 = 18,225.14/x
  3. Step 3: Cross multiply
    20,439.48x = 30,640.66 × 18,225.14
  4. Step 4: Simplify right side
    20,439.48x = 558,430,394.30
  5. Step 5: Solve for x
    x = 558,430,394.30/20,439.48
  6. Step 6: Final answer
    x = 27,321.17

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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.