Home / 20,678.69-28,535.03-11,724.65

Finding the Fourth Proportional to 20,678.69, 28,535.03 and 11,724.65

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Solution

The fourth proportional to 20,678.69, 28,535.03 and 11,724.65 is: 16,179.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.69 : 28,535.03 = 11,724.65 : x
  2. Step 2: Convert to fraction form
    20,678.69/28,535.03 = 11,724.65/x
  3. Step 3: Cross multiply
    20,678.69x = 28,535.03 × 11,724.65
  4. Step 4: Simplify right side
    20,678.69x = 334,563,255.12
  5. Step 5: Solve for x
    x = 334,563,255.12/20,678.69
  6. Step 6: Final answer
    x = 16,179.13

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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.