Home / 20,970.96-28,940.04-11,539.68

Finding the Fourth Proportional to 20,970.96, 28,940.04 and 11,539.68

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Solution

The fourth proportional to 20,970.96, 28,940.04 and 11,539.68 is: 15,924.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.96 : 28,940.04 = 11,539.68 : x
  2. Step 2: Convert to fraction form
    20,970.96/28,940.04 = 11,539.68/x
  3. Step 3: Cross multiply
    20,970.96x = 28,940.04 × 11,539.68
  4. Step 4: Simplify right side
    20,970.96x = 333,958,800.79
  5. Step 5: Solve for x
    x = 333,958,800.79/20,970.96
  6. Step 6: Final answer
    x = 15,924.82

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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.