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Finding the Fourth Proportional to 28,090.55, 42,135.83 and 7,314.05

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Solution

The fourth proportional to 28,090.55, 42,135.83 and 7,314.05 is: 10,971.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,090.55 : 42,135.83 = 7,314.05 : x
  2. Step 2: Convert to fraction form
    28,090.55/42,135.83 = 7,314.05/x
  3. Step 3: Cross multiply
    28,090.55x = 42,135.83 × 7,314.05
  4. Step 4: Simplify right side
    28,090.55x = 308,183,530.84
  5. Step 5: Solve for x
    x = 308,183,530.84/28,090.55
  6. Step 6: Final answer
    x = 10,971.08

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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.