Home / 20,678.91-28,536.30-11,727.24

Finding the Fourth Proportional to 20,678.91, 28,536.30 and 11,727.24

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Solution

The fourth proportional to 20,678.91, 28,536.30 and 11,727.24 is: 16,183.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.91 : 28,536.30 = 11,727.24 : x
  2. Step 2: Convert to fraction form
    20,678.91/28,536.30 = 11,727.24/x
  3. Step 3: Cross multiply
    20,678.91x = 28,536.30 × 11,727.24
  4. Step 4: Simplify right side
    20,678.91x = 334,652,038.81
  5. Step 5: Solve for x
    x = 334,652,038.81/20,678.91
  6. Step 6: Final answer
    x = 16,183.25

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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.