Home / 28,455.20-39,266.96-15,879.84

Finding the Fourth Proportional to 28,455.20, 39,266.96 and 15,879.84

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Solution

The fourth proportional to 28,455.20, 39,266.96 and 15,879.84 is: 21,913.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.20 : 39,266.96 = 15,879.84 : x
  2. Step 2: Convert to fraction form
    28,455.20/39,266.96 = 15,879.84/x
  3. Step 3: Cross multiply
    28,455.20x = 39,266.96 × 15,879.84
  4. Step 4: Simplify right side
    28,455.20x = 623,553,042.09
  5. Step 5: Solve for x
    x = 623,553,042.09/28,455.20
  6. Step 6: Final answer
    x = 21,913.50

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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.