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Finding the Fourth Proportional to 18,704.40, 28,056.60 and 12,362.10

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Solution

The fourth proportional to 18,704.40, 28,056.60 and 12,362.10 is: 18,543.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.40 : 28,056.60 = 12,362.10 : x
  2. Step 2: Convert to fraction form
    18,704.40/28,056.60 = 12,362.10/x
  3. Step 3: Cross multiply
    18,704.40x = 28,056.60 × 12,362.10
  4. Step 4: Simplify right side
    18,704.40x = 346,838,494.86
  5. Step 5: Solve for x
    x = 346,838,494.86/18,704.40
  6. Step 6: Final answer
    x = 18,543.15

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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.