Home / 21,118.88-29,144.06-11,688.86

Finding the Fourth Proportional to 21,118.88, 29,144.06 and 11,688.86

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Solution

The fourth proportional to 21,118.88, 29,144.06 and 11,688.86 is: 16,130.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.88 : 29,144.06 = 11,688.86 : x
  2. Step 2: Convert to fraction form
    21,118.88/29,144.06 = 11,688.86/x
  3. Step 3: Cross multiply
    21,118.88x = 29,144.06 × 11,688.86
  4. Step 4: Simplify right side
    21,118.88x = 340,660,633.01
  5. Step 5: Solve for x
    x = 340,660,633.01/21,118.88
  6. Step 6: Final answer
    x = 16,130.62

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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.