Home / 20,782.32-28,678.23-11,830.74

Finding the Fourth Proportional to 20,782.32, 28,678.23 and 11,830.74

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Solution

The fourth proportional to 20,782.32, 28,678.23 and 11,830.74 is: 16,325.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.32 : 28,678.23 = 11,830.74 : x
  2. Step 2: Convert to fraction form
    20,782.32/28,678.23 = 11,830.74/x
  3. Step 3: Cross multiply
    20,782.32x = 28,678.23 × 11,830.74
  4. Step 4: Simplify right side
    20,782.32x = 339,284,682.79
  5. Step 5: Solve for x
    x = 339,284,682.79/20,782.32
  6. Step 6: Final answer
    x = 16,325.64

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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.