Home / 20,936.57-31,408.70-6,897.42

Finding the Fourth Proportional to 20,936.57, 31,408.70 and 6,897.42

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Solution

The fourth proportional to 20,936.57, 31,408.70 and 6,897.42 is: 10,347.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.57 : 31,408.70 = 6,897.42 : x
  2. Step 2: Convert to fraction form
    20,936.57/31,408.70 = 6,897.42/x
  3. Step 3: Cross multiply
    20,936.57x = 31,408.70 × 6,897.42
  4. Step 4: Simplify right side
    20,936.57x = 216,638,961.07
  5. Step 5: Solve for x
    x = 216,638,961.07/20,936.57
  6. Step 6: Final answer
    x = 10,347.40

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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.