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Finding the Fourth Proportional to 28,321.60, 42,479.63 and 8,600.32

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Solution

The fourth proportional to 28,321.60, 42,479.63 and 8,600.32 is: 12,899.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,321.60 : 42,479.63 = 8,600.32 : x
  2. Step 2: Convert to fraction form
    28,321.60/42,479.63 = 8,600.32/x
  3. Step 3: Cross multiply
    28,321.60x = 42,479.63 × 8,600.32
  4. Step 4: Simplify right side
    28,321.60x = 365,338,411.48
  5. Step 5: Solve for x
    x = 365,338,411.48/28,321.60
  6. Step 6: Final answer
    x = 12,899.64

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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.