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Finding the Fourth Proportional to 28,989.60, 43,500.60 and 12,346.80

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Solution

The fourth proportional to 28,989.60, 43,500.60 and 12,346.80 is: 18,527.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,989.60 : 43,500.60 = 12,346.80 : x
  2. Step 2: Convert to fraction form
    28,989.60/43,500.60 = 12,346.80/x
  3. Step 3: Cross multiply
    28,989.60x = 43,500.60 × 12,346.80
  4. Step 4: Simplify right side
    28,989.60x = 537,093,208.08
  5. Step 5: Solve for x
    x = 537,093,208.08/28,989.60
  6. Step 6: Final answer
    x = 18,527.10

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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.