Home / 28,619.20-42,928.80-7,559.20

Finding the Fourth Proportional to 28,619.20, 42,928.80 and 7,559.20

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Solution

The fourth proportional to 28,619.20, 42,928.80 and 7,559.20 is: 11,338.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,619.20 : 42,928.80 = 7,559.20 : x
  2. Step 2: Convert to fraction form
    28,619.20/42,928.80 = 7,559.20/x
  3. Step 3: Cross multiply
    28,619.20x = 42,928.80 × 7,559.20
  4. Step 4: Simplify right side
    28,619.20x = 324,507,384.96
  5. Step 5: Solve for x
    x = 324,507,384.96/28,619.20
  6. Step 6: Final answer
    x = 11,338.80

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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.