Home / 12,553.80-18,830.70-6,721.80

Finding the Fourth Proportional to 12,553.80, 18,830.70 and 6,721.80

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Solution

The fourth proportional to 12,553.80, 18,830.70 and 6,721.80 is: 10,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,553.80 : 18,830.70 = 6,721.80 : x
  2. Step 2: Convert to fraction form
    12,553.80/18,830.70 = 6,721.80/x
  3. Step 3: Cross multiply
    12,553.80x = 18,830.70 × 6,721.80
  4. Step 4: Simplify right side
    12,553.80x = 126,576,199.26
  5. Step 5: Solve for x
    x = 126,576,199.26/12,553.80
  6. Step 6: Final answer
    x = 10,082.70

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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.