Home / 18,783.86-28,181.28-5,638.20

Finding the Fourth Proportional to 18,783.86, 28,181.28 and 5,638.20

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Solution

The fourth proportional to 18,783.86, 28,181.28 and 5,638.20 is: 8,458.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.86 : 28,181.28 = 5,638.20 : x
  2. Step 2: Convert to fraction form
    18,783.86/28,181.28 = 5,638.20/x
  3. Step 3: Cross multiply
    18,783.86x = 28,181.28 × 5,638.20
  4. Step 4: Simplify right side
    18,783.86x = 158,891,692.90
  5. Step 5: Solve for x
    x = 158,891,692.90/18,783.86
  6. Step 6: Final answer
    x = 8,458.95

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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.