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Finding the Fourth Proportional to 29,664.80, 44,497.20 and 12,128.80

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Solution

The fourth proportional to 29,664.80, 44,497.20 and 12,128.80 is: 18,193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,664.80 : 44,497.20 = 12,128.80 : x
  2. Step 2: Convert to fraction form
    29,664.80/44,497.20 = 12,128.80/x
  3. Step 3: Cross multiply
    29,664.80x = 44,497.20 × 12,128.80
  4. Step 4: Simplify right side
    29,664.80x = 539,697,639.36
  5. Step 5: Solve for x
    x = 539,697,639.36/29,664.80
  6. Step 6: Final answer
    x = 18,193.20

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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.