Home / 19,128.15-26,398.89-11,172.96

Finding the Fourth Proportional to 19,128.15, 26,398.89 and 11,172.96

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Solution

The fourth proportional to 19,128.15, 26,398.89 and 11,172.96 is: 15,419.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.15 : 26,398.89 = 11,172.96 : x
  2. Step 2: Convert to fraction form
    19,128.15/26,398.89 = 11,172.96/x
  3. Step 3: Cross multiply
    19,128.15x = 26,398.89 × 11,172.96
  4. Step 4: Simplify right side
    19,128.15x = 294,953,742.01
  5. Step 5: Solve for x
    x = 294,953,742.01/19,128.15
  6. Step 6: Final answer
    x = 15,419.88

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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.