Home / 8,128.92-12,215.26-7,888.36

Finding the Fourth Proportional to 8,128.92, 12,215.26 and 7,888.36

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Solution

The fourth proportional to 8,128.92, 12,215.26 and 7,888.36 is: 11,853.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.92 : 12,215.26 = 7,888.36 : x
  2. Step 2: Convert to fraction form
    8,128.92/12,215.26 = 7,888.36/x
  3. Step 3: Cross multiply
    8,128.92x = 12,215.26 × 7,888.36
  4. Step 4: Simplify right side
    8,128.92x = 96,358,368.37
  5. Step 5: Solve for x
    x = 96,358,368.37/8,128.92
  6. Step 6: Final answer
    x = 11,853.77

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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.