Home / 20,185.08-30,279.68-7,715.60

Finding the Fourth Proportional to 20,185.08, 30,279.68 and 7,715.60

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Solution

The fourth proportional to 20,185.08, 30,279.68 and 7,715.60 is: 11,574.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,185.08 : 30,279.68 = 7,715.60 : x
  2. Step 2: Convert to fraction form
    20,185.08/30,279.68 = 7,715.60/x
  3. Step 3: Cross multiply
    20,185.08x = 30,279.68 × 7,715.60
  4. Step 4: Simplify right side
    20,185.08x = 233,625,899.01
  5. Step 5: Solve for x
    x = 233,625,899.01/20,185.08
  6. Step 6: Final answer
    x = 11,574.19

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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.