Home / 11,879.40-16,390.75-7,574.25

Finding the Fourth Proportional to 11,879.40, 16,390.75 and 7,574.25

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Solution

The fourth proportional to 11,879.40, 16,390.75 and 7,574.25 is: 10,450.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.40 : 16,390.75 = 7,574.25 : x
  2. Step 2: Convert to fraction form
    11,879.40/16,390.75 = 7,574.25/x
  3. Step 3: Cross multiply
    11,879.40x = 16,390.75 × 7,574.25
  4. Step 4: Simplify right side
    11,879.40x = 124,147,638.19
  5. Step 5: Solve for x
    x = 124,147,638.19/11,879.40
  6. Step 6: Final answer
    x = 10,450.67

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Half scale
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Double scale
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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.