Home / 20,520.91-30,741.18-18,289.39

Finding the Fourth Proportional to 20,520.91, 30,741.18 and 18,289.39

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Solution

The fourth proportional to 20,520.91, 30,741.18 and 18,289.39 is: 27,398.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.91 : 30,741.18 = 18,289.39 : x
  2. Step 2: Convert to fraction form
    20,520.91/30,741.18 = 18,289.39/x
  3. Step 3: Cross multiply
    20,520.91x = 30,741.18 × 18,289.39
  4. Step 4: Simplify right side
    20,520.91x = 562,237,430.08
  5. Step 5: Solve for x
    x = 562,237,430.08/20,520.91
  6. Step 6: Final answer
    x = 27,398.27

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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.