Home / 4,986.40-7,479.60-4,889.20

Finding the Fourth Proportional to 4,986.40, 7,479.60 and 4,889.20

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Solution

The fourth proportional to 4,986.40, 7,479.60 and 4,889.20 is: 7,333.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.40 : 7,479.60 = 4,889.20 : x
  2. Step 2: Convert to fraction form
    4,986.40/7,479.60 = 4,889.20/x
  3. Step 3: Cross multiply
    4,986.40x = 7,479.60 × 4,889.20
  4. Step 4: Simplify right side
    4,986.40x = 36,569,260.32
  5. Step 5: Solve for x
    x = 36,569,260.32/4,986.40
  6. Step 6: Final answer
    x = 7,333.80

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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.