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Finding the Fourth Proportional to 28,290.36, 42,443.48 and 8,300.32

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Solution

The fourth proportional to 28,290.36, 42,443.48 and 8,300.32 is: 12,452.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.36 : 42,443.48 = 8,300.32 : x
  2. Step 2: Convert to fraction form
    28,290.36/42,443.48 = 8,300.32/x
  3. Step 3: Cross multiply
    28,290.36x = 42,443.48 × 8,300.32
  4. Step 4: Simplify right side
    28,290.36x = 352,294,465.91
  5. Step 5: Solve for x
    x = 352,294,465.91/28,290.36
  6. Step 6: Final answer
    x = 12,452.81

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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.