Home / 20,378.98-28,122.51-11,304.31

Finding the Fourth Proportional to 20,378.98, 28,122.51 and 11,304.31

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Solution

The fourth proportional to 20,378.98, 28,122.51 and 11,304.31 is: 15,599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.98 : 28,122.51 = 11,304.31 : x
  2. Step 2: Convert to fraction form
    20,378.98/28,122.51 = 11,304.31/x
  3. Step 3: Cross multiply
    20,378.98x = 28,122.51 × 11,304.31
  4. Step 4: Simplify right side
    20,378.98x = 317,905,571.02
  5. Step 5: Solve for x
    x = 317,905,571.02/20,378.98
  6. Step 6: Final answer
    x = 15,599.68

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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.