Home / 13,678.92-18,879.30-8,090.28

Finding the Fourth Proportional to 13,678.92, 18,879.30 and 8,090.28

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Solution

The fourth proportional to 13,678.92, 18,879.30 and 8,090.28 is: 11,166.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.92 : 18,879.30 = 8,090.28 : x
  2. Step 2: Convert to fraction form
    13,678.92/18,879.30 = 8,090.28/x
  3. Step 3: Cross multiply
    13,678.92x = 18,879.30 × 8,090.28
  4. Step 4: Simplify right side
    13,678.92x = 152,738,823.20
  5. Step 5: Solve for x
    x = 152,738,823.20/13,678.92
  6. Step 6: Final answer
    x = 11,166.00

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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.