Home / 8,085.12-12,128.15-2,161.86

Finding the Fourth Proportional to 8,085.12, 12,128.15 and 2,161.86

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Solution

The fourth proportional to 8,085.12, 12,128.15 and 2,161.86 is: 3,242.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085.12 : 12,128.15 = 2,161.86 : x
  2. Step 2: Convert to fraction form
    8,085.12/12,128.15 = 2,161.86/x
  3. Step 3: Cross multiply
    8,085.12x = 12,128.15 × 2,161.86
  4. Step 4: Simplify right side
    8,085.12x = 26,219,362.36
  5. Step 5: Solve for x
    x = 26,219,362.36/8,085.12
  6. Step 6: Final answer
    x = 3,242.92

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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.