Home / 28,220.88-42,338.36-19,917.12

Finding the Fourth Proportional to 28,220.88, 42,338.36 and 19,917.12

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Solution

The fourth proportional to 28,220.88, 42,338.36 and 19,917.12 is: 29,880.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.88 : 42,338.36 = 19,917.12 : x
  2. Step 2: Convert to fraction form
    28,220.88/42,338.36 = 19,917.12/x
  3. Step 3: Cross multiply
    28,220.88x = 42,338.36 × 19,917.12
  4. Step 4: Simplify right side
    28,220.88x = 843,258,013.06
  5. Step 5: Solve for x
    x = 843,258,013.06/28,220.88
  6. Step 6: Final answer
    x = 29,880.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.