Home / 28,429.20-42,643.80-14,605.20

Finding the Fourth Proportional to 28,429.20, 42,643.80 and 14,605.20

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Solution

The fourth proportional to 28,429.20, 42,643.80 and 14,605.20 is: 21,907.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,429.20 : 42,643.80 = 14,605.20 : x
  2. Step 2: Convert to fraction form
    28,429.20/42,643.80 = 14,605.20/x
  3. Step 3: Cross multiply
    28,429.20x = 42,643.80 × 14,605.20
  4. Step 4: Simplify right side
    28,429.20x = 622,821,227.76
  5. Step 5: Solve for x
    x = 622,821,227.76/28,429.20
  6. Step 6: Final answer
    x = 21,907.80

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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.