Home / 21,081.60-31,622.40-7,936.92

Finding the Fourth Proportional to 21,081.60, 31,622.40 and 7,936.92

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Solution

The fourth proportional to 21,081.60, 31,622.40 and 7,936.92 is: 11,905.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.60 : 31,622.40 = 7,936.92 : x
  2. Step 2: Convert to fraction form
    21,081.60/31,622.40 = 7,936.92/x
  3. Step 3: Cross multiply
    21,081.60x = 31,622.40 × 7,936.92
  4. Step 4: Simplify right side
    21,081.60x = 250,984,459.01
  5. Step 5: Solve for x
    x = 250,984,459.01/21,081.60
  6. Step 6: Final answer
    x = 11,905.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.