Home / 20,238.95-30,360.63-7,769.57

Finding the Fourth Proportional to 20,238.95, 30,360.63 and 7,769.57

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Solution

The fourth proportional to 20,238.95, 30,360.63 and 7,769.57 is: 11,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,238.95 : 30,360.63 = 7,769.57 : x
  2. Step 2: Convert to fraction form
    20,238.95/30,360.63 = 7,769.57/x
  3. Step 3: Cross multiply
    20,238.95x = 30,360.63 × 7,769.57
  4. Step 4: Simplify right side
    20,238.95x = 235,889,040.03
  5. Step 5: Solve for x
    x = 235,889,040.03/20,238.95
  6. Step 6: Final answer
    x = 11,655.20

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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.