Home / 20,430.22-30,644.70-5,640.04

Finding the Fourth Proportional to 20,430.22, 30,644.70 and 5,640.04

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Solution

The fourth proportional to 20,430.22, 30,644.70 and 5,640.04 is: 8,459.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.22 : 30,644.70 = 5,640.04 : x
  2. Step 2: Convert to fraction form
    20,430.22/30,644.70 = 5,640.04/x
  3. Step 3: Cross multiply
    20,430.22x = 30,644.70 × 5,640.04
  4. Step 4: Simplify right side
    20,430.22x = 172,837,333.79
  5. Step 5: Solve for x
    x = 172,837,333.79/20,430.22
  6. Step 6: Final answer
    x = 8,459.89

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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.