Home / 20,449.18-28,220.32-12,495.78

Finding the Fourth Proportional to 20,449.18, 28,220.32 and 12,495.78

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Solution

The fourth proportional to 20,449.18, 28,220.32 and 12,495.78 is: 17,244.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.18 : 28,220.32 = 12,495.78 : x
  2. Step 2: Convert to fraction form
    20,449.18/28,220.32 = 12,495.78/x
  3. Step 3: Cross multiply
    20,449.18x = 28,220.32 × 12,495.78
  4. Step 4: Simplify right side
    20,449.18x = 352,634,910.25
  5. Step 5: Solve for x
    x = 352,634,910.25/20,449.18
  6. Step 6: Final answer
    x = 17,244.45

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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.