Home / 7,085.12-9,775.68-4,290.08

Finding the Fourth Proportional to 7,085.12, 9,775.68 and 4,290.08

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Solution

The fourth proportional to 7,085.12, 9,775.68 and 4,290.08 is: 5,919.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.12 : 9,775.68 = 4,290.08 : x
  2. Step 2: Convert to fraction form
    7,085.12/9,775.68 = 4,290.08/x
  3. Step 3: Cross multiply
    7,085.12x = 9,775.68 × 4,290.08
  4. Step 4: Simplify right side
    7,085.12x = 41,938,449.25
  5. Step 5: Solve for x
    x = 41,938,449.25/7,085.12
  6. Step 6: Final answer
    x = 5,919.23

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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.