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Finding the Fourth Proportional to 5,615.71, 8,425.19 and 1,720.69

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Solution

The fourth proportional to 5,615.71, 8,425.19 and 1,720.69 is: 2,581.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.71 : 8,425.19 = 1,720.69 : x
  2. Step 2: Convert to fraction form
    5,615.71/8,425.19 = 1,720.69/x
  3. Step 3: Cross multiply
    5,615.71x = 8,425.19 × 1,720.69
  4. Step 4: Simplify right side
    5,615.71x = 14,497,131.58
  5. Step 5: Solve for x
    x = 14,497,131.58/5,615.71
  6. Step 6: Final answer
    x = 2,581.53

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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.