Home / 21,119.44-29,143.36-11,688.36

Finding the Fourth Proportional to 21,119.44, 29,143.36 and 11,688.36

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Solution

The fourth proportional to 21,119.44, 29,143.36 and 11,688.36 is: 16,129.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.44 : 29,143.36 = 11,688.36 : x
  2. Step 2: Convert to fraction form
    21,119.44/29,143.36 = 11,688.36/x
  3. Step 3: Cross multiply
    21,119.44x = 29,143.36 × 11,688.36
  4. Step 4: Simplify right side
    21,119.44x = 340,638,083.29
  5. Step 5: Solve for x
    x = 340,638,083.29/21,119.44
  6. Step 6: Final answer
    x = 16,129.12

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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.