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Finding the Fourth Proportional to 29,415.76, 44,123.88 and 8,639.60

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Solution

The fourth proportional to 29,415.76, 44,123.88 and 8,639.60 is: 12,959.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,415.76 : 44,123.88 = 8,639.60 : x
  2. Step 2: Convert to fraction form
    29,415.76/44,123.88 = 8,639.60/x
  3. Step 3: Cross multiply
    29,415.76x = 44,123.88 × 8,639.60
  4. Step 4: Simplify right side
    29,415.76x = 381,212,673.65
  5. Step 5: Solve for x
    x = 381,212,673.65/29,415.76
  6. Step 6: Final answer
    x = 12,959.47

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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.