Home / 30,148.20-45,225-7,961.28

Finding the Fourth Proportional to 30,148.20, 45,225 and 7,961.28

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Solution

The fourth proportional to 30,148.20, 45,225 and 7,961.28 is: 11,942.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,148.20 : 45,225 = 7,961.28 : x
  2. Step 2: Convert to fraction form
    30,148.20/45,225 = 7,961.28/x
  3. Step 3: Cross multiply
    30,148.20x = 45,225 × 7,961.28
  4. Step 4: Simplify right side
    30,148.20x = 360,048,888
  5. Step 5: Solve for x
    x = 360,048,888/30,148.20
  6. Step 6: Final answer
    x = 11,942.63

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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.