Home / 28,181.53-42,272.29-7,121.64

Finding the Fourth Proportional to 28,181.53, 42,272.29 and 7,121.64

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Solution

The fourth proportional to 28,181.53, 42,272.29 and 7,121.64 is: 10,682.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.53 : 42,272.29 = 7,121.64 : x
  2. Step 2: Convert to fraction form
    28,181.53/42,272.29 = 7,121.64/x
  3. Step 3: Cross multiply
    28,181.53x = 42,272.29 × 7,121.64
  4. Step 4: Simplify right side
    28,181.53x = 301,048,031.36
  5. Step 5: Solve for x
    x = 301,048,031.36/28,181.53
  6. Step 6: Final answer
    x = 10,682.46

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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.