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Finding the Fourth Proportional to 30,440.70, 45,664.70 and 12,908.25

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Solution

The fourth proportional to 30,440.70, 45,664.70 and 12,908.25 is: 19,363.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,440.70 : 45,664.70 = 12,908.25 : x
  2. Step 2: Convert to fraction form
    30,440.70/45,664.70 = 12,908.25/x
  3. Step 3: Cross multiply
    30,440.70x = 45,664.70 × 12,908.25
  4. Step 4: Simplify right side
    30,440.70x = 589,451,299.23
  5. Step 5: Solve for x
    x = 589,451,299.23/30,440.70
  6. Step 6: Final answer
    x = 19,363.92

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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.