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Finding the Fourth Proportional to 8,420.33, 12,630.81 and 2,576.99

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Solution

The fourth proportional to 8,420.33, 12,630.81 and 2,576.99 is: 3,865.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.33 : 12,630.81 = 2,576.99 : x
  2. Step 2: Convert to fraction form
    8,420.33/12,630.81 = 2,576.99/x
  3. Step 3: Cross multiply
    8,420.33x = 12,630.81 × 2,576.99
  4. Step 4: Simplify right side
    8,420.33x = 32,549,471.06
  5. Step 5: Solve for x
    x = 32,549,471.06/8,420.33
  6. Step 6: Final answer
    x = 3,865.58

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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.