Home / 21,951.17-30,289.43-12,999.05

Finding the Fourth Proportional to 21,951.17, 30,289.43 and 12,999.05

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Solution

The fourth proportional to 21,951.17, 30,289.43 and 12,999.05 is: 17,936.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.17 : 30,289.43 = 12,999.05 : x
  2. Step 2: Convert to fraction form
    21,951.17/30,289.43 = 12,999.05/x
  3. Step 3: Cross multiply
    21,951.17x = 30,289.43 × 12,999.05
  4. Step 4: Simplify right side
    21,951.17x = 393,733,696.09
  5. Step 5: Solve for x
    x = 393,733,696.09/21,951.17
  6. Step 6: Final answer
    x = 17,936.80

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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.