Home / 7,121.12-9,827.08-4,290.08

Finding the Fourth Proportional to 7,121.12, 9,827.08 and 4,290.08

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Solution

The fourth proportional to 7,121.12, 9,827.08 and 4,290.08 is: 5,920.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.12 : 9,827.08 = 4,290.08 : x
  2. Step 2: Convert to fraction form
    7,121.12/9,827.08 = 4,290.08/x
  3. Step 3: Cross multiply
    7,121.12x = 9,827.08 × 4,290.08
  4. Step 4: Simplify right side
    7,121.12x = 42,158,959.37
  5. Step 5: Solve for x
    x = 42,158,959.37/7,121.12
  6. Step 6: Final answer
    x = 5,920.27

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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.