Home / 13,977.98-20,947.26-7,740.80

Finding the Fourth Proportional to 13,977.98, 20,947.26 and 7,740.80

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Solution

The fourth proportional to 13,977.98, 20,947.26 and 7,740.80 is: 11,600.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.98 : 20,947.26 = 7,740.80 : x
  2. Step 2: Convert to fraction form
    13,977.98/20,947.26 = 7,740.80/x
  3. Step 3: Cross multiply
    13,977.98x = 20,947.26 × 7,740.80
  4. Step 4: Simplify right side
    13,977.98x = 162,148,550.21
  5. Step 5: Solve for x
    x = 162,148,550.21/13,977.98
  6. Step 6: Final answer
    x = 11,600.28

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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.