Home / 13,640.48-18,820.40-8,333.36

Finding the Fourth Proportional to 13,640.48, 18,820.40 and 8,333.36

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Solution

The fourth proportional to 13,640.48, 18,820.40 and 8,333.36 is: 11,497.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.48 : 18,820.40 = 8,333.36 : x
  2. Step 2: Convert to fraction form
    13,640.48/18,820.40 = 8,333.36/x
  3. Step 3: Cross multiply
    13,640.48x = 18,820.40 × 8,333.36
  4. Step 4: Simplify right side
    13,640.48x = 156,837,168.54
  5. Step 5: Solve for x
    x = 156,837,168.54/13,640.48
  6. Step 6: Final answer
    x = 11,497.92

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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.