Home / 13,840.20-19,097.75-7,789.69

Finding the Fourth Proportional to 13,840.20, 19,097.75 and 7,789.69

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Solution

The fourth proportional to 13,840.20, 19,097.75 and 7,789.69 is: 10,748.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.20 : 19,097.75 = 7,789.69 : x
  2. Step 2: Convert to fraction form
    13,840.20/19,097.75 = 7,789.69/x
  3. Step 3: Cross multiply
    13,840.20x = 19,097.75 × 7,789.69
  4. Step 4: Simplify right side
    13,840.20x = 148,765,506.49
  5. Step 5: Solve for x
    x = 148,765,506.49/13,840.20
  6. Step 6: Final answer
    x = 10,748.80

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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.