Home / 15,494.87-21,383.13-8,421.29

Finding the Fourth Proportional to 15,494.87, 21,383.13 and 8,421.29

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Solution

The fourth proportional to 15,494.87, 21,383.13 and 8,421.29 is: 11,621.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.87 : 21,383.13 = 8,421.29 : x
  2. Step 2: Convert to fraction form
    15,494.87/21,383.13 = 8,421.29/x
  3. Step 3: Cross multiply
    15,494.87x = 21,383.13 × 8,421.29
  4. Step 4: Simplify right side
    15,494.87x = 180,073,431.92
  5. Step 5: Solve for x
    x = 180,073,431.92/15,494.87
  6. Step 6: Final answer
    x = 11,621.49

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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.