Home / 30,530.25-42,110.70-21,474.82

Finding the Fourth Proportional to 30,530.25, 42,110.70 and 21,474.82

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Solution

The fourth proportional to 30,530.25, 42,110.70 and 21,474.82 is: 29,620.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,530.25 : 42,110.70 = 21,474.82 : x
  2. Step 2: Convert to fraction form
    30,530.25/42,110.70 = 21,474.82/x
  3. Step 3: Cross multiply
    30,530.25x = 42,110.70 × 21,474.82
  4. Step 4: Simplify right side
    30,530.25x = 904,319,492.02
  5. Step 5: Solve for x
    x = 904,319,492.02/30,530.25
  6. Step 6: Final answer
    x = 29,620.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.