Home / 5,436.81-8,149.68-2,148.12

Finding the Fourth Proportional to 5,436.81, 8,149.68 and 2,148.12

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Solution

The fourth proportional to 5,436.81, 8,149.68 and 2,148.12 is: 3,219.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,436.81 : 8,149.68 = 2,148.12 : x
  2. Step 2: Convert to fraction form
    5,436.81/8,149.68 = 2,148.12/x
  3. Step 3: Cross multiply
    5,436.81x = 8,149.68 × 2,148.12
  4. Step 4: Simplify right side
    5,436.81x = 17,506,490.60
  5. Step 5: Solve for x
    x = 17,506,490.60/5,436.81
  6. Step 6: Final answer
    x = 3,219.99

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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.