Home / 12,721.58-17,556.89-7,416.28

Finding the Fourth Proportional to 12,721.58, 17,556.89 and 7,416.28

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Solution

The fourth proportional to 12,721.58, 17,556.89 and 7,416.28 is: 10,235.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.58 : 17,556.89 = 7,416.28 : x
  2. Step 2: Convert to fraction form
    12,721.58/17,556.89 = 7,416.28/x
  3. Step 3: Cross multiply
    12,721.58x = 17,556.89 × 7,416.28
  4. Step 4: Simplify right side
    12,721.58x = 130,206,812.17
  5. Step 5: Solve for x
    x = 130,206,812.17/12,721.58
  6. Step 6: Final answer
    x = 10,235.11

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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.