Home / 21,150.96-29,188.08-11,719.20

Finding the Fourth Proportional to 21,150.96, 29,188.08 and 11,719.20

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Solution

The fourth proportional to 21,150.96, 29,188.08 and 11,719.20 is: 16,172.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.96 : 29,188.08 = 11,719.20 : x
  2. Step 2: Convert to fraction form
    21,150.96/29,188.08 = 11,719.20/x
  3. Step 3: Cross multiply
    21,150.96x = 29,188.08 × 11,719.20
  4. Step 4: Simplify right side
    21,150.96x = 342,060,947.14
  5. Step 5: Solve for x
    x = 342,060,947.14/21,150.96
  6. Step 6: Final answer
    x = 16,172.36

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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.