Home / 15,522.78-21,421.49-8,449.19

Finding the Fourth Proportional to 15,522.78, 21,421.49 and 8,449.19

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Solution

The fourth proportional to 15,522.78, 21,421.49 and 8,449.19 is: 11,659.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.78 : 21,421.49 = 8,449.19 : x
  2. Step 2: Convert to fraction form
    15,522.78/21,421.49 = 8,449.19/x
  3. Step 3: Cross multiply
    15,522.78x = 21,421.49 × 8,449.19
  4. Step 4: Simplify right side
    15,522.78x = 180,994,239.09
  5. Step 5: Solve for x
    x = 180,994,239.09/15,522.78
  6. Step 6: Final answer
    x = 11,659.91

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Half scale
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Double scale
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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.