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Finding the Fourth Proportional to 18,925.92, 28,401.03 and 12,692.97

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Solution

The fourth proportional to 18,925.92, 28,401.03 and 12,692.97 is: 19,047.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,925.92 : 28,401.03 = 12,692.97 : x
  2. Step 2: Convert to fraction form
    18,925.92/28,401.03 = 12,692.97/x
  3. Step 3: Cross multiply
    18,925.92x = 28,401.03 × 12,692.97
  4. Step 4: Simplify right side
    18,925.92x = 360,493,421.76
  5. Step 5: Solve for x
    x = 360,493,421.76/18,925.92
  6. Step 6: Final answer
    x = 19,047.60

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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.