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Finding the Fourth Proportional to 28,405.56, 42,608.61 and 7,629.06

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Solution

The fourth proportional to 28,405.56, 42,608.61 and 7,629.06 is: 11,443.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.56 : 42,608.61 = 7,629.06 : x
  2. Step 2: Convert to fraction form
    28,405.56/42,608.61 = 7,629.06/x
  3. Step 3: Cross multiply
    28,405.56x = 42,608.61 × 7,629.06
  4. Step 4: Simplify right side
    28,405.56x = 325,063,642.21
  5. Step 5: Solve for x
    x = 325,063,642.21/28,405.56
  6. Step 6: Final answer
    x = 11,443.66

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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.