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Finding the Fourth Proportional to 25,212.80, 37,819.20 and 21,116.80

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Solution

The fourth proportional to 25,212.80, 37,819.20 and 21,116.80 is: 31,675.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,212.80 : 37,819.20 = 21,116.80 : x
  2. Step 2: Convert to fraction form
    25,212.80/37,819.20 = 21,116.80/x
  3. Step 3: Cross multiply
    25,212.80x = 37,819.20 × 21,116.80
  4. Step 4: Simplify right side
    25,212.80x = 798,620,482.56
  5. Step 5: Solve for x
    x = 798,620,482.56/25,212.80
  6. Step 6: Final answer
    x = 31,675.20

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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.