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Finding the Fourth Proportional to 18,803.51, 28,209.94 and 13,267.67

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Solution

The fourth proportional to 18,803.51, 28,209.94 and 13,267.67 is: 19,904.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.51 : 28,209.94 = 13,267.67 : x
  2. Step 2: Convert to fraction form
    18,803.51/28,209.94 = 13,267.67/x
  3. Step 3: Cross multiply
    18,803.51x = 28,209.94 × 13,267.67
  4. Step 4: Simplify right side
    18,803.51x = 374,280,000.42
  5. Step 5: Solve for x
    x = 374,280,000.42/18,803.51
  6. Step 6: Final answer
    x = 19,904.80

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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.