Home / 12,721.30-17,551.20-7,683.64

Finding the Fourth Proportional to 12,721.30, 17,551.20 and 7,683.64

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Solution

The fourth proportional to 12,721.30, 17,551.20 and 7,683.64 is: 10,600.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.30 : 17,551.20 = 7,683.64 : x
  2. Step 2: Convert to fraction form
    12,721.30/17,551.20 = 7,683.64/x
  3. Step 3: Cross multiply
    12,721.30x = 17,551.20 × 7,683.64
  4. Step 4: Simplify right side
    12,721.30x = 134,857,102.37
  5. Step 5: Solve for x
    x = 134,857,102.37/12,721.30
  6. Step 6: Final answer
    x = 10,600.89

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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.