Home / 13,621.48-18,799.02-8,319.40

Finding the Fourth Proportional to 13,621.48, 18,799.02 and 8,319.40

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Solution

The fourth proportional to 13,621.48, 18,799.02 and 8,319.40 is: 11,481.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.48 : 18,799.02 = 8,319.40 : x
  2. Step 2: Convert to fraction form
    13,621.48/18,799.02 = 8,319.40/x
  3. Step 3: Cross multiply
    13,621.48x = 18,799.02 × 8,319.40
  4. Step 4: Simplify right side
    13,621.48x = 156,396,566.99
  5. Step 5: Solve for x
    x = 156,396,566.99/13,621.48
  6. Step 6: Final answer
    x = 11,481.61

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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.