Home / 15,522.96-21,420.56-8,449.28

Finding the Fourth Proportional to 15,522.96, 21,420.56 and 8,449.28

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Solution

The fourth proportional to 15,522.96, 21,420.56 and 8,449.28 is: 11,659.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.96 : 21,420.56 = 8,449.28 : x
  2. Step 2: Convert to fraction form
    15,522.96/21,420.56 = 8,449.28/x
  3. Step 3: Cross multiply
    15,522.96x = 21,420.56 × 8,449.28
  4. Step 4: Simplify right side
    15,522.96x = 180,988,309.20
  5. Step 5: Solve for x
    x = 180,988,309.20/15,522.96
  6. Step 6: Final answer
    x = 11,659.39

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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.