Home / 15,522.75-21,421.40-8,449.22

Finding the Fourth Proportional to 15,522.75, 21,421.40 and 8,449.22

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Solution

The fourth proportional to 15,522.75, 21,421.40 and 8,449.22 is: 11,659.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.75 : 21,421.40 = 8,449.22 : x
  2. Step 2: Convert to fraction form
    15,522.75/21,421.40 = 8,449.22/x
  3. Step 3: Cross multiply
    15,522.75x = 21,421.40 × 8,449.22
  4. Step 4: Simplify right side
    15,522.75x = 180,994,132.62
  5. Step 5: Solve for x
    x = 180,994,132.62/15,522.75
  6. Step 6: Final answer
    x = 11,659.93

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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.