Home / 20,996.84-28,975.98-11,565.41

Finding the Fourth Proportional to 20,996.84, 28,975.98 and 11,565.41

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Solution

The fourth proportional to 20,996.84, 28,975.98 and 11,565.41 is: 15,960.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.84 : 28,975.98 = 11,565.41 : x
  2. Step 2: Convert to fraction form
    20,996.84/28,975.98 = 11,565.41/x
  3. Step 3: Cross multiply
    20,996.84x = 28,975.98 × 11,565.41
  4. Step 4: Simplify right side
    20,996.84x = 335,118,943.97
  5. Step 5: Solve for x
    x = 335,118,943.97/20,996.84
  6. Step 6: Final answer
    x = 15,960.45

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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.