Home / 20,440.48-28,208.64-12,486.28

Finding the Fourth Proportional to 20,440.48, 28,208.64 and 12,486.28

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Solution

The fourth proportional to 20,440.48, 28,208.64 and 12,486.28 is: 17,231.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.48 : 28,208.64 = 12,486.28 : x
  2. Step 2: Convert to fraction form
    20,440.48/28,208.64 = 12,486.28/x
  3. Step 3: Cross multiply
    20,440.48x = 28,208.64 × 12,486.28
  4. Step 4: Simplify right side
    20,440.48x = 352,220,977.46
  5. Step 5: Solve for x
    x = 352,220,977.46/20,440.48
  6. Step 6: Final answer
    x = 17,231.54

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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.