Home / 21,316.86-31,936.96-12,546.99

Finding the Fourth Proportional to 21,316.86, 31,936.96 and 12,546.99

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Solution

The fourth proportional to 21,316.86, 31,936.96 and 12,546.99 is: 18,797.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.86 : 31,936.96 = 12,546.99 : x
  2. Step 2: Convert to fraction form
    21,316.86/31,936.96 = 12,546.99/x
  3. Step 3: Cross multiply
    21,316.86x = 31,936.96 × 12,546.99
  4. Step 4: Simplify right side
    21,316.86x = 400,712,717.75
  5. Step 5: Solve for x
    x = 400,712,717.75/21,316.86
  6. Step 6: Final answer
    x = 18,797.92

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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.