Home / 28,630.78-39,492.30-20,684.68

Finding the Fourth Proportional to 28,630.78, 39,492.30 and 20,684.68

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Solution

The fourth proportional to 28,630.78, 39,492.30 and 20,684.68 is: 28,531.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,630.78 : 39,492.30 = 20,684.68 : x
  2. Step 2: Convert to fraction form
    28,630.78/39,492.30 = 20,684.68/x
  3. Step 3: Cross multiply
    28,630.78x = 39,492.30 × 20,684.68
  4. Step 4: Simplify right side
    28,630.78x = 816,885,587.96
  5. Step 5: Solve for x
    x = 816,885,587.96/28,630.78
  6. Step 6: Final answer
    x = 28,531.73

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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.