Home / 7,118.40-9,821.70-4,284.80

Finding the Fourth Proportional to 7,118.40, 9,821.70 and 4,284.80

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Solution

The fourth proportional to 7,118.40, 9,821.70 and 4,284.80 is: 5,912.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,118.40 : 9,821.70 = 4,284.80 : x
  2. Step 2: Convert to fraction form
    7,118.40/9,821.70 = 4,284.80/x
  3. Step 3: Cross multiply
    7,118.40x = 9,821.70 × 4,284.80
  4. Step 4: Simplify right side
    7,118.40x = 42,084,020.16
  5. Step 5: Solve for x
    x = 42,084,020.16/7,118.40
  6. Step 6: Final answer
    x = 5,912.01

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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.