Home / 15,109.56-20,851.20-8,820.72

Finding the Fourth Proportional to 15,109.56, 20,851.20 and 8,820.72

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Solution

The fourth proportional to 15,109.56, 20,851.20 and 8,820.72 is: 12,172.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,109.56 : 20,851.20 = 8,820.72 : x
  2. Step 2: Convert to fraction form
    15,109.56/20,851.20 = 8,820.72/x
  3. Step 3: Cross multiply
    15,109.56x = 20,851.20 × 8,820.72
  4. Step 4: Simplify right side
    15,109.56x = 183,922,596.86
  5. Step 5: Solve for x
    x = 183,922,596.86/15,109.56
  6. Step 6: Final answer
    x = 12,172.60

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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.