Home / 20,936.47-28,893.70-12,983.99

Finding the Fourth Proportional to 20,936.47, 28,893.70 and 12,983.99

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Solution

The fourth proportional to 20,936.47, 28,893.70 and 12,983.99 is: 17,918.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.47 : 28,893.70 = 12,983.99 : x
  2. Step 2: Convert to fraction form
    20,936.47/28,893.70 = 12,983.99/x
  3. Step 3: Cross multiply
    20,936.47x = 28,893.70 × 12,983.99
  4. Step 4: Simplify right side
    20,936.47x = 375,155,446.94
  5. Step 5: Solve for x
    x = 375,155,446.94/20,936.47
  6. Step 6: Final answer
    x = 17,918.75

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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.