Home / 13,947.48-20,913.12-5,620.68

Finding the Fourth Proportional to 13,947.48, 20,913.12 and 5,620.68

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Solution

The fourth proportional to 13,947.48, 20,913.12 and 5,620.68 is: 8,427.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.48 : 20,913.12 = 5,620.68 : x
  2. Step 2: Convert to fraction form
    13,947.48/20,913.12 = 5,620.68/x
  3. Step 3: Cross multiply
    13,947.48x = 20,913.12 × 5,620.68
  4. Step 4: Simplify right side
    13,947.48x = 117,545,955.32
  5. Step 5: Solve for x
    x = 117,545,955.32/13,947.48
  6. Step 6: Final answer
    x = 8,427.76

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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.