Home / 5,518.50-8,278.65-1,820.95

Finding the Fourth Proportional to 5,518.50, 8,278.65 and 1,820.95

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Solution

The fourth proportional to 5,518.50, 8,278.65 and 1,820.95 is: 2,731.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,518.50 : 8,278.65 = 1,820.95 : x
  2. Step 2: Convert to fraction form
    5,518.50/8,278.65 = 1,820.95/x
  3. Step 3: Cross multiply
    5,518.50x = 8,278.65 × 1,820.95
  4. Step 4: Simplify right side
    5,518.50x = 15,075,007.72
  5. Step 5: Solve for x
    x = 15,075,007.72/5,518.50
  6. Step 6: Final answer
    x = 2,731.72

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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.