Home / 15,109.88-20,851.22-8,395.42

Finding the Fourth Proportional to 15,109.88, 20,851.22 and 8,395.42

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Solution

The fourth proportional to 15,109.88, 20,851.22 and 8,395.42 is: 11,585.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,109.88 : 20,851.22 = 8,395.42 : x
  2. Step 2: Convert to fraction form
    15,109.88/20,851.22 = 8,395.42/x
  3. Step 3: Cross multiply
    15,109.88x = 20,851.22 × 8,395.42
  4. Step 4: Simplify right side
    15,109.88x = 175,054,749.41
  5. Step 5: Solve for x
    x = 175,054,749.41/15,109.88
  6. Step 6: Final answer
    x = 11,585.45

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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.