Home / 12,749.76-17,589.60-7,784.64

Finding the Fourth Proportional to 12,749.76, 17,589.60 and 7,784.64

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Solution

The fourth proportional to 12,749.76, 17,589.60 and 7,784.64 is: 10,739.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,749.76 : 17,589.60 = 7,784.64 : x
  2. Step 2: Convert to fraction form
    12,749.76/17,589.60 = 7,784.64/x
  3. Step 3: Cross multiply
    12,749.76x = 17,589.60 × 7,784.64
  4. Step 4: Simplify right side
    12,749.76x = 136,928,703.74
  5. Step 5: Solve for x
    x = 136,928,703.74/12,749.76
  6. Step 6: Final answer
    x = 10,739.71

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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.