Home / 13,640.39-20,456.48-8,960.21

Finding the Fourth Proportional to 13,640.39, 20,456.48 and 8,960.21

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Solution

The fourth proportional to 13,640.39, 20,456.48 and 8,960.21 is: 13,437.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.39 : 20,456.48 = 8,960.21 : x
  2. Step 2: Convert to fraction form
    13,640.39/20,456.48 = 8,960.21/x
  3. Step 3: Cross multiply
    13,640.39x = 20,456.48 × 8,960.21
  4. Step 4: Simplify right side
    13,640.39x = 183,294,430.20
  5. Step 5: Solve for x
    x = 183,294,430.20/13,640.39
  6. Step 6: Final answer
    x = 13,437.62

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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.