Home / 25,953.98-38,905.04-12,815.78

Finding the Fourth Proportional to 25,953.98, 38,905.04 and 12,815.78

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Solution

The fourth proportional to 25,953.98, 38,905.04 and 12,815.78 is: 19,210.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,953.98 : 38,905.04 = 12,815.78 : x
  2. Step 2: Convert to fraction form
    25,953.98/38,905.04 = 12,815.78/x
  3. Step 3: Cross multiply
    25,953.98x = 38,905.04 × 12,815.78
  4. Step 4: Simplify right side
    25,953.98x = 498,598,271.05
  5. Step 5: Solve for x
    x = 498,598,271.05/25,953.98
  6. Step 6: Final answer
    x = 19,210.86

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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.