Home / 20,970.75-28,939.84-11,539.52

Finding the Fourth Proportional to 20,970.75, 28,939.84 and 11,539.52

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Solution

The fourth proportional to 20,970.75, 28,939.84 and 11,539.52 is: 15,924.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.75 : 28,939.84 = 11,539.52 : x
  2. Step 2: Convert to fraction form
    20,970.75/28,939.84 = 11,539.52/x
  3. Step 3: Cross multiply
    20,970.75x = 28,939.84 × 11,539.52
  4. Step 4: Simplify right side
    20,970.75x = 333,951,688.93
  5. Step 5: Solve for x
    x = 333,951,688.93/20,970.75
  6. Step 6: Final answer
    x = 15,924.64

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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.