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Finding the Fourth Proportional to 28,959.65, 43,360.46 and 21,918.36

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Solution

The fourth proportional to 28,959.65, 43,360.46 and 21,918.36 is: 32,817.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,959.65 : 43,360.46 = 21,918.36 : x
  2. Step 2: Convert to fraction form
    28,959.65/43,360.46 = 21,918.36/x
  3. Step 3: Cross multiply
    28,959.65x = 43,360.46 × 21,918.36
  4. Step 4: Simplify right side
    28,959.65x = 950,390,062.45
  5. Step 5: Solve for x
    x = 950,390,062.45/28,959.65
  6. Step 6: Final answer
    x = 32,817.74

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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.