Home / 20,421.23-30,631.77-5,630.22

Finding the Fourth Proportional to 20,421.23, 30,631.77 and 5,630.22

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Solution

The fourth proportional to 20,421.23, 30,631.77 and 5,630.22 is: 8,445.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.23 : 30,631.77 = 5,630.22 : x
  2. Step 2: Convert to fraction form
    20,421.23/30,631.77 = 5,630.22/x
  3. Step 3: Cross multiply
    20,421.23x = 30,631.77 × 5,630.22
  4. Step 4: Simplify right side
    20,421.23x = 172,463,604.09
  5. Step 5: Solve for x
    x = 172,463,604.09/20,421.23
  6. Step 6: Final answer
    x = 8,445.31

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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.