Home / 15,478.35-21,360.22-8,404.78

Finding the Fourth Proportional to 15,478.35, 21,360.22 and 8,404.78

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Solution

The fourth proportional to 15,478.35, 21,360.22 and 8,404.78 is: 11,598.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.35 : 21,360.22 = 8,404.78 : x
  2. Step 2: Convert to fraction form
    15,478.35/21,360.22 = 8,404.78/x
  3. Step 3: Cross multiply
    15,478.35x = 21,360.22 × 8,404.78
  4. Step 4: Simplify right side
    15,478.35x = 179,527,854.43
  5. Step 5: Solve for x
    x = 179,527,854.43/15,478.35
  6. Step 6: Final answer
    x = 11,598.64

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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.