Home / 21,441.42-31,902.62-20,905.74

Finding the Fourth Proportional to 21,441.42, 31,902.62 and 20,905.74

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Solution

The fourth proportional to 21,441.42, 31,902.62 and 20,905.74 is: 31,105.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,441.42 : 31,902.62 = 20,905.74 : x
  2. Step 2: Convert to fraction form
    21,441.42/31,902.62 = 20,905.74/x
  3. Step 3: Cross multiply
    21,441.42x = 31,902.62 × 20,905.74
  4. Step 4: Simplify right side
    21,441.42x = 666,947,774.51
  5. Step 5: Solve for x
    x = 666,947,774.51/21,441.42
  6. Step 6: Final answer
    x = 31,105.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.