Home / 8,439.36-12,661.60-5,978.94

Finding the Fourth Proportional to 8,439.36, 12,661.60 and 5,978.94

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Solution

The fourth proportional to 8,439.36, 12,661.60 and 5,978.94 is: 8,970.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.36 : 12,661.60 = 5,978.94 : x
  2. Step 2: Convert to fraction form
    8,439.36/12,661.60 = 5,978.94/x
  3. Step 3: Cross multiply
    8,439.36x = 12,661.60 × 5,978.94
  4. Step 4: Simplify right side
    8,439.36x = 75,702,946.70
  5. Step 5: Solve for x
    x = 75,702,946.70/8,439.36
  6. Step 6: Final answer
    x = 8,970.22

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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.