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Finding the Fourth Proportional to 30,748.32, 46,121.64 and 8,560.80

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Solution

The fourth proportional to 30,748.32, 46,121.64 and 8,560.80 is: 12,840.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,748.32 : 46,121.64 = 8,560.80 : x
  2. Step 2: Convert to fraction form
    30,748.32/46,121.64 = 8,560.80/x
  3. Step 3: Cross multiply
    30,748.32x = 46,121.64 × 8,560.80
  4. Step 4: Simplify right side
    30,748.32x = 394,838,135.71
  5. Step 5: Solve for x
    x = 394,838,135.71/30,748.32
  6. Step 6: Final answer
    x = 12,840.97

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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.