Home / 20,430.36-30,641.86-5,635.61

Finding the Fourth Proportional to 20,430.36, 30,641.86 and 5,635.61

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Solution

The fourth proportional to 20,430.36, 30,641.86 and 5,635.61 is: 8,452.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.36 : 30,641.86 = 5,635.61 : x
  2. Step 2: Convert to fraction form
    20,430.36/30,641.86 = 5,635.61/x
  3. Step 3: Cross multiply
    20,430.36x = 30,641.86 × 5,635.61
  4. Step 4: Simplify right side
    20,430.36x = 172,685,541.38
  5. Step 5: Solve for x
    x = 172,685,541.38/20,430.36
  6. Step 6: Final answer
    x = 8,452.40

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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.