Home / 20,636.70-28,478.75-11,205.26

Finding the Fourth Proportional to 20,636.70, 28,478.75 and 11,205.26

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Solution

The fourth proportional to 20,636.70, 28,478.75 and 11,205.26 is: 15,463.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.70 : 28,478.75 = 11,205.26 : x
  2. Step 2: Convert to fraction form
    20,636.70/28,478.75 = 11,205.26/x
  3. Step 3: Cross multiply
    20,636.70x = 28,478.75 × 11,205.26
  4. Step 4: Simplify right side
    20,636.70x = 319,111,798.23
  5. Step 5: Solve for x
    x = 319,111,798.23/20,636.70
  6. Step 6: Final answer
    x = 15,463.32

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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.