Home / 21,821.19-30,112.93-14,280.09

Finding the Fourth Proportional to 21,821.19, 30,112.93 and 14,280.09

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Solution

The fourth proportional to 21,821.19, 30,112.93 and 14,280.09 is: 19,706.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.19 : 30,112.93 = 14,280.09 : x
  2. Step 2: Convert to fraction form
    21,821.19/30,112.93 = 14,280.09/x
  3. Step 3: Cross multiply
    21,821.19x = 30,112.93 × 14,280.09
  4. Step 4: Simplify right side
    21,821.19x = 430,015,350.56
  5. Step 5: Solve for x
    x = 430,015,350.56/21,821.19
  6. Step 6: Final answer
    x = 19,706.32

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1.5x scale

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.