Home / 13,778.40-19,012.44-7,809.96

Finding the Fourth Proportional to 13,778.40, 19,012.44 and 7,809.96

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Solution

The fourth proportional to 13,778.40, 19,012.44 and 7,809.96 is: 10,776.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.40 : 19,012.44 = 7,809.96 : x
  2. Step 2: Convert to fraction form
    13,778.40/19,012.44 = 7,809.96/x
  3. Step 3: Cross multiply
    13,778.40x = 19,012.44 × 7,809.96
  4. Step 4: Simplify right side
    13,778.40x = 148,486,395.90
  5. Step 5: Solve for x
    x = 148,486,395.90/13,778.40
  6. Step 6: Final answer
    x = 10,776.75

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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.