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Finding the Fourth Proportional to 30,121.65, 45,179.04 and 7,936.74

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Solution

The fourth proportional to 30,121.65, 45,179.04 and 7,936.74 is: 11,904.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,121.65 : 45,179.04 = 7,936.74 : x
  2. Step 2: Convert to fraction form
    30,121.65/45,179.04 = 7,936.74/x
  3. Step 3: Cross multiply
    30,121.65x = 45,179.04 × 7,936.74
  4. Step 4: Simplify right side
    30,121.65x = 358,574,293.93
  5. Step 5: Solve for x
    x = 358,574,293.93/30,121.65
  6. Step 6: Final answer
    x = 11,904.20

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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.