Home / 6,981-9,633.78-4,188.12

Finding the Fourth Proportional to 6,981, 9,633.78 and 4,188.12

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Solution

The fourth proportional to 6,981, 9,633.78 and 4,188.12 is: 5,779.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,981 : 9,633.78 = 4,188.12 : x
  2. Step 2: Convert to fraction form
    6,981/9,633.78 = 4,188.12/x
  3. Step 3: Cross multiply
    6,981x = 9,633.78 × 4,188.12
  4. Step 4: Simplify right side
    6,981x = 40,347,426.69
  5. Step 5: Solve for x
    x = 40,347,426.69/6,981
  6. Step 6: Final answer
    x = 5,779.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.