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Finding the Fourth Proportional to 8,280.29, 12,420.47 and 4,125.47

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Solution

The fourth proportional to 8,280.29, 12,420.47 and 4,125.47 is: 6,188.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280.29 : 12,420.47 = 4,125.47 : x
  2. Step 2: Convert to fraction form
    8,280.29/12,420.47 = 4,125.47/x
  3. Step 3: Cross multiply
    8,280.29x = 12,420.47 × 4,125.47
  4. Step 4: Simplify right side
    8,280.29x = 51,240,224.58
  5. Step 5: Solve for x
    x = 51,240,224.58/8,280.29
  6. Step 6: Final answer
    x = 6,188.21

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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.