Home / 20,936.10-31,406.88-6,897.57

Finding the Fourth Proportional to 20,936.10, 31,406.88 and 6,897.57

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Solution

The fourth proportional to 20,936.10, 31,406.88 and 6,897.57 is: 10,347.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.10 : 31,406.88 = 6,897.57 : x
  2. Step 2: Convert to fraction form
    20,936.10/31,406.88 = 6,897.57/x
  3. Step 3: Cross multiply
    20,936.10x = 31,406.88 × 6,897.57
  4. Step 4: Simplify right side
    20,936.10x = 216,631,153.28
  5. Step 5: Solve for x
    x = 216,631,153.28/20,936.10
  6. Step 6: Final answer
    x = 10,347.25

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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.