Home / 20,970.98-28,939.96-11,539.55

Finding the Fourth Proportional to 20,970.98, 28,939.96 and 11,539.55

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Solution

The fourth proportional to 20,970.98, 28,939.96 and 11,539.55 is: 15,924.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.98 : 28,939.96 = 11,539.55 : x
  2. Step 2: Convert to fraction form
    20,970.98/28,939.96 = 11,539.55/x
  3. Step 3: Cross multiply
    20,970.98x = 28,939.96 × 11,539.55
  4. Step 4: Simplify right side
    20,970.98x = 333,954,006.95
  5. Step 5: Solve for x
    x = 333,954,006.95/20,970.98
  6. Step 6: Final answer
    x = 15,924.57

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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.