Home / 5,519-8,279.40-1,821.45

Finding the Fourth Proportional to 5,519, 8,279.40 and 1,821.45

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Solution

The fourth proportional to 5,519, 8,279.40 and 1,821.45 is: 2,732.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,519 : 8,279.40 = 1,821.45 : x
  2. Step 2: Convert to fraction form
    5,519/8,279.40 = 1,821.45/x
  3. Step 3: Cross multiply
    5,519x = 8,279.40 × 1,821.45
  4. Step 4: Simplify right side
    5,519x = 15,080,513.13
  5. Step 5: Solve for x
    x = 15,080,513.13/5,519
  6. Step 6: Final answer
    x = 2,732.47

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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.