Home / 8,088.18-12,128.76-3,405.84

Finding the Fourth Proportional to 8,088.18, 12,128.76 and 3,405.84

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Solution

The fourth proportional to 8,088.18, 12,128.76 and 3,405.84 is: 5,107.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,088.18 : 12,128.76 = 3,405.84 : x
  2. Step 2: Convert to fraction form
    8,088.18/12,128.76 = 3,405.84/x
  3. Step 3: Cross multiply
    8,088.18x = 12,128.76 × 3,405.84
  4. Step 4: Simplify right side
    8,088.18x = 41,308,615.96
  5. Step 5: Solve for x
    x = 41,308,615.96/8,088.18
  6. Step 6: Final answer
    x = 5,107.28

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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.