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Finding the Fourth Proportional to 30,422.84, 41,980.78 and 16,992.92

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Solution

The fourth proportional to 30,422.84, 41,980.78 and 16,992.92 is: 23,448.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,422.84 : 41,980.78 = 16,992.92 : x
  2. Step 2: Convert to fraction form
    30,422.84/41,980.78 = 16,992.92/x
  3. Step 3: Cross multiply
    30,422.84x = 41,980.78 × 16,992.92
  4. Step 4: Simplify right side
    30,422.84x = 713,376,036.08
  5. Step 5: Solve for x
    x = 713,376,036.08/30,422.84
  6. Step 6: Final answer
    x = 23,448.70

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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.