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Finding the Fourth Proportional to 30,382.56, 45,573.48 and 12,840.48

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Solution

The fourth proportional to 30,382.56, 45,573.48 and 12,840.48 is: 19,260.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,382.56 : 45,573.48 = 12,840.48 : x
  2. Step 2: Convert to fraction form
    30,382.56/45,573.48 = 12,840.48/x
  3. Step 3: Cross multiply
    30,382.56x = 45,573.48 × 12,840.48
  4. Step 4: Simplify right side
    30,382.56x = 585,185,358.47
  5. Step 5: Solve for x
    x = 585,185,358.47/30,382.56
  6. Step 6: Final answer
    x = 19,260.57

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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.