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Finding the Fourth Proportional to 28,704.60, 43,056.90 and 8,989.20

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Solution

The fourth proportional to 28,704.60, 43,056.90 and 8,989.20 is: 13,483.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,704.60 : 43,056.90 = 8,989.20 : x
  2. Step 2: Convert to fraction form
    28,704.60/43,056.90 = 8,989.20/x
  3. Step 3: Cross multiply
    28,704.60x = 43,056.90 × 8,989.20
  4. Step 4: Simplify right side
    28,704.60x = 387,047,085.48
  5. Step 5: Solve for x
    x = 387,047,085.48/28,704.60
  6. Step 6: Final answer
    x = 13,483.80

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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.