Home / 4,929.40-7,388.70-2,155.60

Finding the Fourth Proportional to 4,929.40, 7,388.70 and 2,155.60

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Solution

The fourth proportional to 4,929.40, 7,388.70 and 2,155.60 is: 3,231.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,929.40 : 7,388.70 = 2,155.60 : x
  2. Step 2: Convert to fraction form
    4,929.40/7,388.70 = 2,155.60/x
  3. Step 3: Cross multiply
    4,929.40x = 7,388.70 × 2,155.60
  4. Step 4: Simplify right side
    4,929.40x = 15,927,081.72
  5. Step 5: Solve for x
    x = 15,927,081.72/4,929.40
  6. Step 6: Final answer
    x = 3,231.04

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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.