Home / 5,318.81-7,977.35-1,986.18

Finding the Fourth Proportional to 5,318.81, 7,977.35 and 1,986.18

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Solution

The fourth proportional to 5,318.81, 7,977.35 and 1,986.18 is: 2,978.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.81 : 7,977.35 = 1,986.18 : x
  2. Step 2: Convert to fraction form
    5,318.81/7,977.35 = 1,986.18/x
  3. Step 3: Cross multiply
    5,318.81x = 7,977.35 × 1,986.18
  4. Step 4: Simplify right side
    5,318.81x = 15,844,475.78
  5. Step 5: Solve for x
    x = 15,844,475.78/5,318.81
  6. Step 6: Final answer
    x = 2,978.95

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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.