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Finding the Fourth Proportional to 30,368.29, 41,908.31 and 16,939.20

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Solution

The fourth proportional to 30,368.29, 41,908.31 and 16,939.20 is: 23,376.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,368.29 : 41,908.31 = 16,939.20 : x
  2. Step 2: Convert to fraction form
    30,368.29/41,908.31 = 16,939.20/x
  3. Step 3: Cross multiply
    30,368.29x = 41,908.31 × 16,939.20
  4. Step 4: Simplify right side
    30,368.29x = 709,893,244.75
  5. Step 5: Solve for x
    x = 709,893,244.75/30,368.29
  6. Step 6: Final answer
    x = 23,376.13

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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.