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Finding the Fourth Proportional to 28,912.40, 43,368.60 and 11,373.20

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Solution

The fourth proportional to 28,912.40, 43,368.60 and 11,373.20 is: 17,059.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,912.40 : 43,368.60 = 11,373.20 : x
  2. Step 2: Convert to fraction form
    28,912.40/43,368.60 = 11,373.20/x
  3. Step 3: Cross multiply
    28,912.40x = 43,368.60 × 11,373.20
  4. Step 4: Simplify right side
    28,912.40x = 493,239,761.52
  5. Step 5: Solve for x
    x = 493,239,761.52/28,912.40
  6. Step 6: Final answer
    x = 17,059.80

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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.