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Finding the Fourth Proportional to 28,321.84, 42,480.01 and 8,600.57

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Solution

The fourth proportional to 28,321.84, 42,480.01 and 8,600.57 is: 12,900.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,321.84 : 42,480.01 = 8,600.57 : x
  2. Step 2: Convert to fraction form
    28,321.84/42,480.01 = 8,600.57/x
  3. Step 3: Cross multiply
    28,321.84x = 42,480.01 × 8,600.57
  4. Step 4: Simplify right side
    28,321.84x = 365,352,065.70
  5. Step 5: Solve for x
    x = 365,352,065.70/28,321.84
  6. Step 6: Final answer
    x = 12,900.01

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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.