Home / 13,608.95-20,420.83-5,289.28

Finding the Fourth Proportional to 13,608.95, 20,420.83 and 5,289.28

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Solution

The fourth proportional to 13,608.95, 20,420.83 and 5,289.28 is: 7,936.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.95 : 20,420.83 = 5,289.28 : x
  2. Step 2: Convert to fraction form
    13,608.95/20,420.83 = 5,289.28/x
  3. Step 3: Cross multiply
    13,608.95x = 20,420.83 × 5,289.28
  4. Step 4: Simplify right side
    13,608.95x = 108,011,443.26
  5. Step 5: Solve for x
    x = 108,011,443.26/13,608.95
  6. Step 6: Final answer
    x = 7,936.80

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1.5x scale

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.