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Finding the Fourth Proportional to 30,363.72, 41,904.92 and 18,426.12

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Solution

The fourth proportional to 30,363.72, 41,904.92 and 18,426.12 is: 25,429.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,363.72 : 41,904.92 = 18,426.12 : x
  2. Step 2: Convert to fraction form
    30,363.72/41,904.92 = 18,426.12/x
  3. Step 3: Cross multiply
    30,363.72x = 41,904.92 × 18,426.12
  4. Step 4: Simplify right side
    30,363.72x = 772,145,084.51
  5. Step 5: Solve for x
    x = 772,145,084.51/30,363.72
  6. Step 6: Final answer
    x = 25,429.86

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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.