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Finding the Fourth Proportional to 14,027.40, 19,357.80 and 7,739.78

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Solution

The fourth proportional to 14,027.40, 19,357.80 and 7,739.78 is: 10,680.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,027.40 : 19,357.80 = 7,739.78 : x
  2. Step 2: Convert to fraction form
    14,027.40/19,357.80 = 7,739.78/x
  3. Step 3: Cross multiply
    14,027.40x = 19,357.80 × 7,739.78
  4. Step 4: Simplify right side
    14,027.40x = 149,824,977.80
  5. Step 5: Solve for x
    x = 149,824,977.80/14,027.40
  6. Step 6: Final answer
    x = 10,680.88

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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.