Home / 28,866.04-39,846.54-21,789.88

Finding the Fourth Proportional to 28,866.04, 39,846.54 and 21,789.88

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Solution

The fourth proportional to 28,866.04, 39,846.54 and 21,789.88 is: 30,078.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,866.04 : 39,846.54 = 21,789.88 : x
  2. Step 2: Convert to fraction form
    28,866.04/39,846.54 = 21,789.88/x
  3. Step 3: Cross multiply
    28,866.04x = 39,846.54 × 21,789.88
  4. Step 4: Simplify right side
    28,866.04x = 868,251,325.02
  5. Step 5: Solve for x
    x = 868,251,325.02/28,866.04
  6. Step 6: Final answer
    x = 30,078.64

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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.