Home / 21,118.92-29,144.36-11,688.36

Finding the Fourth Proportional to 21,118.92, 29,144.36 and 11,688.36

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Solution

The fourth proportional to 21,118.92, 29,144.36 and 11,688.36 is: 16,130.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.92 : 29,144.36 = 11,688.36 : x
  2. Step 2: Convert to fraction form
    21,118.92/29,144.36 = 11,688.36/x
  3. Step 3: Cross multiply
    21,118.92x = 29,144.36 × 11,688.36
  4. Step 4: Simplify right side
    21,118.92x = 340,649,771.65
  5. Step 5: Solve for x
    x = 340,649,771.65/21,118.92
  6. Step 6: Final answer
    x = 16,130.08

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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.