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Finding the Fourth Proportional to 28,321, 42,486.36 and 8,601.55

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Solution

The fourth proportional to 28,321, 42,486.36 and 8,601.55 is: 12,903.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,321 : 42,486.36 = 8,601.55 : x
  2. Step 2: Convert to fraction form
    28,321/42,486.36 = 8,601.55/x
  3. Step 3: Cross multiply
    28,321x = 42,486.36 × 8,601.55
  4. Step 4: Simplify right side
    28,321x = 365,448,549.86
  5. Step 5: Solve for x
    x = 365,448,549.86/28,321
  6. Step 6: Final answer
    x = 12,903.80

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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.