Home / 21,140.36-29,172.74-11,708.36

Finding the Fourth Proportional to 21,140.36, 29,172.74 and 11,708.36

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Solution

The fourth proportional to 21,140.36, 29,172.74 and 11,708.36 is: 16,157.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.36 : 29,172.74 = 11,708.36 : x
  2. Step 2: Convert to fraction form
    21,140.36/29,172.74 = 11,708.36/x
  3. Step 3: Cross multiply
    21,140.36x = 29,172.74 × 11,708.36
  4. Step 4: Simplify right side
    21,140.36x = 341,564,942.11
  5. Step 5: Solve for x
    x = 341,564,942.11/21,140.36
  6. Step 6: Final answer
    x = 16,157.01

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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.