Home / 15,015.35-20,720.84-8,556.18

Finding the Fourth Proportional to 15,015.35, 20,720.84 and 8,556.18

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Solution

The fourth proportional to 15,015.35, 20,720.84 and 8,556.18 is: 11,807.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.35 : 20,720.84 = 8,556.18 : x
  2. Step 2: Convert to fraction form
    15,015.35/20,720.84 = 8,556.18/x
  3. Step 3: Cross multiply
    15,015.35x = 20,720.84 × 8,556.18
  4. Step 4: Simplify right side
    15,015.35x = 177,291,256.93
  5. Step 5: Solve for x
    x = 177,291,256.93/15,015.35
  6. Step 6: Final answer
    x = 11,807.33

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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.