Home / 21,320.58-31,991.67-14,380.50

Finding the Fourth Proportional to 21,320.58, 31,991.67 and 14,380.50

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Solution

The fourth proportional to 21,320.58, 31,991.67 and 14,380.50 is: 21,578.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.58 : 31,991.67 = 14,380.50 : x
  2. Step 2: Convert to fraction form
    21,320.58/31,991.67 = 14,380.50/x
  3. Step 3: Cross multiply
    21,320.58x = 31,991.67 × 14,380.50
  4. Step 4: Simplify right side
    21,320.58x = 460,056,210.44
  5. Step 5: Solve for x
    x = 460,056,210.44/21,320.58
  6. Step 6: Final answer
    x = 21,578.03

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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.