Home / 28,986.80-43,480.20-21,988.40

Finding the Fourth Proportional to 28,986.80, 43,480.20 and 21,988.40

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Solution

The fourth proportional to 28,986.80, 43,480.20 and 21,988.40 is: 32,982.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986.80 : 43,480.20 = 21,988.40 : x
  2. Step 2: Convert to fraction form
    28,986.80/43,480.20 = 21,988.40/x
  3. Step 3: Cross multiply
    28,986.80x = 43,480.20 × 21,988.40
  4. Step 4: Simplify right side
    28,986.80x = 956,060,029.68
  5. Step 5: Solve for x
    x = 956,060,029.68/28,986.80
  6. Step 6: Final answer
    x = 32,982.60

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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.