Home / 20,478.33-28,260.18-12,520.44

Finding the Fourth Proportional to 20,478.33, 28,260.18 and 12,520.44

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Solution

The fourth proportional to 20,478.33, 28,260.18 and 12,520.44 is: 17,278.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.33 : 28,260.18 = 12,520.44 : x
  2. Step 2: Convert to fraction form
    20,478.33/28,260.18 = 12,520.44/x
  3. Step 3: Cross multiply
    20,478.33x = 28,260.18 × 12,520.44
  4. Step 4: Simplify right side
    20,478.33x = 353,829,888.08
  5. Step 5: Solve for x
    x = 353,829,888.08/20,478.33
  6. Step 6: Final answer
    x = 17,278.26

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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.