Home / 28,579.40-42,917.70-21,192.20

Finding the Fourth Proportional to 28,579.40, 42,917.70 and 21,192.20

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Solution

The fourth proportional to 28,579.40, 42,917.70 and 21,192.20 is: 31,824.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,579.40 : 42,917.70 = 21,192.20 : x
  2. Step 2: Convert to fraction form
    28,579.40/42,917.70 = 21,192.20/x
  3. Step 3: Cross multiply
    28,579.40x = 42,917.70 × 21,192.20
  4. Step 4: Simplify right side
    28,579.40x = 909,520,481.94
  5. Step 5: Solve for x
    x = 909,520,481.94/28,579.40
  6. Step 6: Final answer
    x = 31,824.34

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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.