Home / 20,431.71-30,647.63-5,640.30

Finding the Fourth Proportional to 20,431.71, 30,647.63 and 5,640.30

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Solution

The fourth proportional to 20,431.71, 30,647.63 and 5,640.30 is: 8,460.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.71 : 30,647.63 = 5,640.30 : x
  2. Step 2: Convert to fraction form
    20,431.71/30,647.63 = 5,640.30/x
  3. Step 3: Cross multiply
    20,431.71x = 30,647.63 × 5,640.30
  4. Step 4: Simplify right side
    20,431.71x = 172,861,841.59
  5. Step 5: Solve for x
    x = 172,861,841.59/20,431.71
  6. Step 6: Final answer
    x = 8,460.47

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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.