Home / 8,280.12-12,420.28-3,283.72

Finding the Fourth Proportional to 8,280.12, 12,420.28 and 3,283.72

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Solution

The fourth proportional to 8,280.12, 12,420.28 and 3,283.72 is: 4,925.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280.12 : 12,420.28 = 3,283.72 : x
  2. Step 2: Convert to fraction form
    8,280.12/12,420.28 = 3,283.72/x
  3. Step 3: Cross multiply
    8,280.12x = 12,420.28 × 3,283.72
  4. Step 4: Simplify right side
    8,280.12x = 40,784,721.84
  5. Step 5: Solve for x
    x = 40,784,721.84/8,280.12
  6. Step 6: Final answer
    x = 4,925.62

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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.