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Finding the Fourth Proportional to 28,442.62, 42,661.05 and 7,668.22

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Solution

The fourth proportional to 28,442.62, 42,661.05 and 7,668.22 is: 11,501.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.62 : 42,661.05 = 7,668.22 : x
  2. Step 2: Convert to fraction form
    28,442.62/42,661.05 = 7,668.22/x
  3. Step 3: Cross multiply
    28,442.62x = 42,661.05 × 7,668.22
  4. Step 4: Simplify right side
    28,442.62x = 327,134,316.83
  5. Step 5: Solve for x
    x = 327,134,316.83/28,442.62
  6. Step 6: Final answer
    x = 11,501.55

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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.