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Finding the Fourth Proportional to 29,112.40, 43,686.60 and 11,580.40

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Solution

The fourth proportional to 29,112.40, 43,686.60 and 11,580.40 is: 17,377.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,112.40 : 43,686.60 = 11,580.40 : x
  2. Step 2: Convert to fraction form
    29,112.40/43,686.60 = 11,580.40/x
  3. Step 3: Cross multiply
    29,112.40x = 43,686.60 × 11,580.40
  4. Step 4: Simplify right side
    29,112.40x = 505,908,302.64
  5. Step 5: Solve for x
    x = 505,908,302.64/29,112.40
  6. Step 6: Final answer
    x = 17,377.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.