Home / 13,947.20-19,245.60-7,980.48

Finding the Fourth Proportional to 13,947.20, 19,245.60 and 7,980.48

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Solution

The fourth proportional to 13,947.20, 19,245.60 and 7,980.48 is: 11,012.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.20 : 19,245.60 = 7,980.48 : x
  2. Step 2: Convert to fraction form
    13,947.20/19,245.60 = 7,980.48/x
  3. Step 3: Cross multiply
    13,947.20x = 19,245.60 × 7,980.48
  4. Step 4: Simplify right side
    13,947.20x = 153,589,125.89
  5. Step 5: Solve for x
    x = 153,589,125.89/13,947.20
  6. Step 6: Final answer
    x = 11,012.18

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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.