Home / 20,936.40-28,885.09-12,975.72

Finding the Fourth Proportional to 20,936.40, 28,885.09 and 12,975.72

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Solution

The fourth proportional to 20,936.40, 28,885.09 and 12,975.72 is: 17,902.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.40 : 28,885.09 = 12,975.72 : x
  2. Step 2: Convert to fraction form
    20,936.40/28,885.09 = 12,975.72/x
  3. Step 3: Cross multiply
    20,936.40x = 28,885.09 × 12,975.72
  4. Step 4: Simplify right side
    20,936.40x = 374,804,840.01
  5. Step 5: Solve for x
    x = 374,804,840.01/20,936.40
  6. Step 6: Final answer
    x = 17,902.07

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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.