Home / 5,428.40-8,142.60-3,484.40

Finding the Fourth Proportional to 5,428.40, 8,142.60 and 3,484.40

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Solution

The fourth proportional to 5,428.40, 8,142.60 and 3,484.40 is: 5,226.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.40 : 8,142.60 = 3,484.40 : x
  2. Step 2: Convert to fraction form
    5,428.40/8,142.60 = 3,484.40/x
  3. Step 3: Cross multiply
    5,428.40x = 8,142.60 × 3,484.40
  4. Step 4: Simplify right side
    5,428.40x = 28,372,075.44
  5. Step 5: Solve for x
    x = 28,372,075.44/5,428.40
  6. Step 6: Final answer
    x = 5,226.60

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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.