Home / 20,613.51-30,917.75-8,772.05

Finding the Fourth Proportional to 20,613.51, 30,917.75 and 8,772.05

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Solution

The fourth proportional to 20,613.51, 30,917.75 and 8,772.05 is: 13,157.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.51 : 30,917.75 = 8,772.05 : x
  2. Step 2: Convert to fraction form
    20,613.51/30,917.75 = 8,772.05/x
  3. Step 3: Cross multiply
    20,613.51x = 30,917.75 × 8,772.05
  4. Step 4: Simplify right side
    20,613.51x = 271,212,082.32
  5. Step 5: Solve for x
    x = 271,212,082.32/20,613.51
  6. Step 6: Final answer
    x = 13,157.01

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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.