Home / 28,679.60-39,566.79-21,143.85

Finding the Fourth Proportional to 28,679.60, 39,566.79 and 21,143.85

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Solution

The fourth proportional to 28,679.60, 39,566.79 and 21,143.85 is: 29,170.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.60 : 39,566.79 = 21,143.85 : x
  2. Step 2: Convert to fraction form
    28,679.60/39,566.79 = 21,143.85/x
  3. Step 3: Cross multiply
    28,679.60x = 39,566.79 × 21,143.85
  4. Step 4: Simplify right side
    28,679.60x = 836,594,124.37
  5. Step 5: Solve for x
    x = 836,594,124.37/28,679.60
  6. Step 6: Final answer
    x = 29,170.35

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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.