Home / 12,721.32-17,556.10-7,685.48

Finding the Fourth Proportional to 12,721.32, 17,556.10 and 7,685.48

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Solution

The fourth proportional to 12,721.32, 17,556.10 and 7,685.48 is: 10,606.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.32 : 17,556.10 = 7,685.48 : x
  2. Step 2: Convert to fraction form
    12,721.32/17,556.10 = 7,685.48/x
  3. Step 3: Cross multiply
    12,721.32x = 17,556.10 × 7,685.48
  4. Step 4: Simplify right side
    12,721.32x = 134,927,134.14
  5. Step 5: Solve for x
    x = 134,927,134.14/12,721.32
  6. Step 6: Final answer
    x = 10,606.38

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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.