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Finding the Fourth Proportional to 30,361.32, 45,606.72 and 28,585.80

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Solution

The fourth proportional to 30,361.32, 45,606.72 and 28,585.80 is: 42,939.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,361.32 : 45,606.72 = 28,585.80 : x
  2. Step 2: Convert to fraction form
    30,361.32/45,606.72 = 28,585.80/x
  3. Step 3: Cross multiply
    30,361.32x = 45,606.72 × 28,585.80
  4. Step 4: Simplify right side
    30,361.32x = 1,303,704,576.58
  5. Step 5: Solve for x
    x = 1,303,704,576.58/30,361.32
  6. Step 6: Final answer
    x = 42,939.65

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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.