Home / 20,581.28-28,403.48-12,622.42

Finding the Fourth Proportional to 20,581.28, 28,403.48 and 12,622.42

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Solution

The fourth proportional to 20,581.28, 28,403.48 and 12,622.42 is: 17,419.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.28 : 28,403.48 = 12,622.42 : x
  2. Step 2: Convert to fraction form
    20,581.28/28,403.48 = 12,622.42/x
  3. Step 3: Cross multiply
    20,581.28x = 28,403.48 × 12,622.42
  4. Step 4: Simplify right side
    20,581.28x = 358,520,650.08
  5. Step 5: Solve for x
    x = 358,520,650.08/20,581.28
  6. Step 6: Final answer
    x = 17,419.75

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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.