Home / 12,721.36-17,553.90-7,684.74

Finding the Fourth Proportional to 12,721.36, 17,553.90 and 7,684.74

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Solution

The fourth proportional to 12,721.36, 17,553.90 and 7,684.74 is: 10,603.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.36 : 17,553.90 = 7,684.74 : x
  2. Step 2: Convert to fraction form
    12,721.36/17,553.90 = 7,684.74/x
  3. Step 3: Cross multiply
    12,721.36x = 17,553.90 × 7,684.74
  4. Step 4: Simplify right side
    12,721.36x = 134,897,157.49
  5. Step 5: Solve for x
    x = 134,897,157.49/12,721.36
  6. Step 6: Final answer
    x = 10,603.99

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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.