Home / 21,150.64-29,188.38-11,719

Finding the Fourth Proportional to 21,150.64, 29,188.38 and 11,719

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Solution

The fourth proportional to 21,150.64, 29,188.38 and 11,719 is: 16,172.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.64 : 29,188.38 = 11,719 : x
  2. Step 2: Convert to fraction form
    21,150.64/29,188.38 = 11,719/x
  3. Step 3: Cross multiply
    21,150.64x = 29,188.38 × 11,719
  4. Step 4: Simplify right side
    21,150.64x = 342,058,625.22
  5. Step 5: Solve for x
    x = 342,058,625.22/21,150.64
  6. Step 6: Final answer
    x = 16,172.50

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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.