Home / 12,556.80-18,835.20-9,785.55

Finding the Fourth Proportional to 12,556.80, 18,835.20 and 9,785.55

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Solution

The fourth proportional to 12,556.80, 18,835.20 and 9,785.55 is: 14,678.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,556.80 : 18,835.20 = 9,785.55 : x
  2. Step 2: Convert to fraction form
    12,556.80/18,835.20 = 9,785.55/x
  3. Step 3: Cross multiply
    12,556.80x = 18,835.20 × 9,785.55
  4. Step 4: Simplify right side
    12,556.80x = 184,312,791.36
  5. Step 5: Solve for x
    x = 184,312,791.36/12,556.80
  6. Step 6: Final answer
    x = 14,678.33

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Similar ratio
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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.