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Finding the Fourth Proportional to 8,959.76, 13,439.94 and 4,280.30

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Solution

The fourth proportional to 8,959.76, 13,439.94 and 4,280.30 is: 6,420.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.76 : 13,439.94 = 4,280.30 : x
  2. Step 2: Convert to fraction form
    8,959.76/13,439.94 = 4,280.30/x
  3. Step 3: Cross multiply
    8,959.76x = 13,439.94 × 4,280.30
  4. Step 4: Simplify right side
    8,959.76x = 57,526,975.18
  5. Step 5: Solve for x
    x = 57,526,975.18/8,959.76
  6. Step 6: Final answer
    x = 6,420.59

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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.