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Finding the Fourth Proportional to 28,596.52, 42,835.74 and 21,209.32

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Solution

The fourth proportional to 28,596.52, 42,835.74 and 21,209.32 is: 31,770.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,596.52 : 42,835.74 = 21,209.32 : x
  2. Step 2: Convert to fraction form
    28,596.52/42,835.74 = 21,209.32/x
  3. Step 3: Cross multiply
    28,596.52x = 42,835.74 × 21,209.32
  4. Step 4: Simplify right side
    28,596.52x = 908,516,917.10
  5. Step 5: Solve for x
    x = 908,516,917.10/28,596.52
  6. Step 6: Final answer
    x = 31,770.19

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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.