Home / 15,739.92-21,721.68-8,666.16

Finding the Fourth Proportional to 15,739.92, 21,721.68 and 8,666.16

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Solution

The fourth proportional to 15,739.92, 21,721.68 and 8,666.16 is: 11,959.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.92 : 21,721.68 = 8,666.16 : x
  2. Step 2: Convert to fraction form
    15,739.92/21,721.68 = 8,666.16/x
  3. Step 3: Cross multiply
    15,739.92x = 21,721.68 × 8,666.16
  4. Step 4: Simplify right side
    15,739.92x = 188,243,554.35
  5. Step 5: Solve for x
    x = 188,243,554.35/15,739.92
  6. Step 6: Final answer
    x = 11,959.63

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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.