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Finding the Fourth Proportional to 30,507.79, 45,687.17 and 18,804.91

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Solution

The fourth proportional to 30,507.79, 45,687.17 and 18,804.91 is: 28,161.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,507.79 : 45,687.17 = 18,804.91 : x
  2. Step 2: Convert to fraction form
    30,507.79/45,687.17 = 18,804.91/x
  3. Step 3: Cross multiply
    30,507.79x = 45,687.17 × 18,804.91
  4. Step 4: Simplify right side
    30,507.79x = 859,143,025.98
  5. Step 5: Solve for x
    x = 859,143,025.98/30,507.79
  6. Step 6: Final answer
    x = 28,161.43

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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.