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Finding the Fourth Proportional to 28,620.84, 42,945.84 and 13,036.44

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Solution

The fourth proportional to 28,620.84, 42,945.84 and 13,036.44 is: 19,561.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,620.84 : 42,945.84 = 13,036.44 : x
  2. Step 2: Convert to fraction form
    28,620.84/42,945.84 = 13,036.44/x
  3. Step 3: Cross multiply
    28,620.84x = 42,945.84 × 13,036.44
  4. Step 4: Simplify right side
    28,620.84x = 559,860,866.41
  5. Step 5: Solve for x
    x = 559,860,866.41/28,620.84
  6. Step 6: Final answer
    x = 19,561.30

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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.