Home / 20,678.25-30,992.67-7,515.21

Finding the Fourth Proportional to 20,678.25, 30,992.67 and 7,515.21

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Solution

The fourth proportional to 20,678.25, 30,992.67 and 7,515.21 is: 11,263.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.25 : 30,992.67 = 7,515.21 : x
  2. Step 2: Convert to fraction form
    20,678.25/30,992.67 = 7,515.21/x
  3. Step 3: Cross multiply
    20,678.25x = 30,992.67 × 7,515.21
  4. Step 4: Simplify right side
    20,678.25x = 232,916,423.51
  5. Step 5: Solve for x
    x = 232,916,423.51/20,678.25
  6. Step 6: Final answer
    x = 11,263.84

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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.