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Finding the Fourth Proportional to 28,080.58, 42,119.54 and 7,020.76

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Solution

The fourth proportional to 28,080.58, 42,119.54 and 7,020.76 is: 10,530.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.58 : 42,119.54 = 7,020.76 : x
  2. Step 2: Convert to fraction form
    28,080.58/42,119.54 = 7,020.76/x
  3. Step 3: Cross multiply
    28,080.58x = 42,119.54 × 7,020.76
  4. Step 4: Simplify right side
    28,080.58x = 295,711,181.65
  5. Step 5: Solve for x
    x = 295,711,181.65/28,080.58
  6. Step 6: Final answer
    x = 10,530.81

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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.