Home / 20,972.58-28,940.42-12,357.42

Finding the Fourth Proportional to 20,972.58, 28,940.42 and 12,357.42

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Solution

The fourth proportional to 20,972.58, 28,940.42 and 12,357.42 is: 17,052.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.58 : 28,940.42 = 12,357.42 : x
  2. Step 2: Convert to fraction form
    20,972.58/28,940.42 = 12,357.42/x
  3. Step 3: Cross multiply
    20,972.58x = 28,940.42 × 12,357.42
  4. Step 4: Simplify right side
    20,972.58x = 357,628,955.81
  5. Step 5: Solve for x
    x = 357,628,955.81/20,972.58
  6. Step 6: Final answer
    x = 17,052.22

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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.