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Finding the Fourth Proportional to 28,978.36, 43,482.12 and 21,597.64

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Solution

The fourth proportional to 28,978.36, 43,482.12 and 21,597.64 is: 32,407.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.36 : 43,482.12 = 21,597.64 : x
  2. Step 2: Convert to fraction form
    28,978.36/43,482.12 = 21,597.64/x
  3. Step 3: Cross multiply
    28,978.36x = 43,482.12 × 21,597.64
  4. Step 4: Simplify right side
    28,978.36x = 939,111,174.20
  5. Step 5: Solve for x
    x = 939,111,174.20/28,978.36
  6. Step 6: Final answer
    x = 32,407.33

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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.