Home / 15,519.15-21,416.28-8,445.56

Finding the Fourth Proportional to 15,519.15, 21,416.28 and 8,445.56

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Solution

The fourth proportional to 15,519.15, 21,416.28 and 8,445.56 is: 11,654.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,519.15 : 21,416.28 = 8,445.56 : x
  2. Step 2: Convert to fraction form
    15,519.15/21,416.28 = 8,445.56/x
  3. Step 3: Cross multiply
    15,519.15x = 21,416.28 × 8,445.56
  4. Step 4: Simplify right side
    15,519.15x = 180,872,370.64
  5. Step 5: Solve for x
    x = 180,872,370.64/15,519.15
  6. Step 6: Final answer
    x = 11,654.79

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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.