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Finding the Fourth Proportional to 30,390.52, 41,941.02 and 16,964.40

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Solution

The fourth proportional to 30,390.52, 41,941.02 and 16,964.40 is: 23,412.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,390.52 : 41,941.02 = 16,964.40 : x
  2. Step 2: Convert to fraction form
    30,390.52/41,941.02 = 16,964.40/x
  3. Step 3: Cross multiply
    30,390.52x = 41,941.02 × 16,964.40
  4. Step 4: Simplify right side
    30,390.52x = 711,504,239.69
  5. Step 5: Solve for x
    x = 711,504,239.69/30,390.52
  6. Step 6: Final answer
    x = 23,412.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.