Home / 20,492.26-28,269.12-12,520.60

Finding the Fourth Proportional to 20,492.26, 28,269.12 and 12,520.60

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Solution

The fourth proportional to 20,492.26, 28,269.12 and 12,520.60 is: 17,272.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,492.26 : 28,269.12 = 12,520.60 : x
  2. Step 2: Convert to fraction form
    20,492.26/28,269.12 = 12,520.60/x
  3. Step 3: Cross multiply
    20,492.26x = 28,269.12 × 12,520.60
  4. Step 4: Simplify right side
    20,492.26x = 353,946,343.87
  5. Step 5: Solve for x
    x = 353,946,343.87/20,492.26
  6. Step 6: Final answer
    x = 17,272.20

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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.