Home / 12,912.35-17,817.57-7,247.21

Finding the Fourth Proportional to 12,912.35, 17,817.57 and 7,247.21

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Solution

The fourth proportional to 12,912.35, 17,817.57 and 7,247.21 is: 10,000.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.35 : 17,817.57 = 7,247.21 : x
  2. Step 2: Convert to fraction form
    12,912.35/17,817.57 = 7,247.21/x
  3. Step 3: Cross multiply
    12,912.35x = 17,817.57 × 7,247.21
  4. Step 4: Simplify right side
    12,912.35x = 129,127,582.39
  5. Step 5: Solve for x
    x = 129,127,582.39/12,912.35
  6. Step 6: Final answer
    x = 10,000.32

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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.