Home / 20,742.16-31,119.39-8,255.07

Finding the Fourth Proportional to 20,742.16, 31,119.39 and 8,255.07

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Solution

The fourth proportional to 20,742.16, 31,119.39 and 8,255.07 is: 12,385.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.16 : 31,119.39 = 8,255.07 : x
  2. Step 2: Convert to fraction form
    20,742.16/31,119.39 = 8,255.07/x
  3. Step 3: Cross multiply
    20,742.16x = 31,119.39 × 8,255.07
  4. Step 4: Simplify right side
    20,742.16x = 256,892,742.81
  5. Step 5: Solve for x
    x = 256,892,742.81/20,742.16
  6. Step 6: Final answer
    x = 12,385.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.