Home / 20,970.63-28,939.67-11,539.39

Finding the Fourth Proportional to 20,970.63, 28,939.67 and 11,539.39

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Solution

The fourth proportional to 20,970.63, 28,939.67 and 11,539.39 is: 15,924.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.63 : 28,939.67 = 11,539.39 : x
  2. Step 2: Convert to fraction form
    20,970.63/28,939.67 = 11,539.39/x
  3. Step 3: Cross multiply
    20,970.63x = 28,939.67 × 11,539.39
  4. Step 4: Simplify right side
    20,970.63x = 333,946,138.60
  5. Step 5: Solve for x
    x = 333,946,138.60/20,970.63
  6. Step 6: Final answer
    x = 15,924.47

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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.