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Finding the Fourth Proportional to 30,639.59, 45,963.71 and 10,912.31

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Solution

The fourth proportional to 30,639.59, 45,963.71 and 10,912.31 is: 16,370.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,639.59 : 45,963.71 = 10,912.31 : x
  2. Step 2: Convert to fraction form
    30,639.59/45,963.71 = 10,912.31/x
  3. Step 3: Cross multiply
    30,639.59x = 45,963.71 × 10,912.31
  4. Step 4: Simplify right side
    30,639.59x = 501,570,252.27
  5. Step 5: Solve for x
    x = 501,570,252.27/30,639.59
  6. Step 6: Final answer
    x = 16,370.01

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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.