Home / 28,004.79-42,007.18-8,281.81

Finding the Fourth Proportional to 28,004.79, 42,007.18 and 8,281.81

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Solution

The fourth proportional to 28,004.79, 42,007.18 and 8,281.81 is: 12,422.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,004.79 : 42,007.18 = 8,281.81 : x
  2. Step 2: Convert to fraction form
    28,004.79/42,007.18 = 8,281.81/x
  3. Step 3: Cross multiply
    28,004.79x = 42,007.18 × 8,281.81
  4. Step 4: Simplify right side
    28,004.79x = 347,895,514.45
  5. Step 5: Solve for x
    x = 347,895,514.45/28,004.79
  6. Step 6: Final answer
    x = 12,422.71

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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.