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Finding the Fourth Proportional to 30,357.81, 41,891.81 and 16,928.28

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Solution

The fourth proportional to 30,357.81, 41,891.81 and 16,928.28 is: 23,359.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,357.81 : 41,891.81 = 16,928.28 : x
  2. Step 2: Convert to fraction form
    30,357.81/41,891.81 = 16,928.28/x
  3. Step 3: Cross multiply
    30,357.81x = 41,891.81 × 16,928.28
  4. Step 4: Simplify right side
    30,357.81x = 709,156,204.75
  5. Step 5: Solve for x
    x = 709,156,204.75/30,357.81
  6. Step 6: Final answer
    x = 23,359.93

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1.5x scale

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.