Home / 10,072.78-15,111.56-9,905.44

Finding the Fourth Proportional to 10,072.78, 15,111.56 and 9,905.44

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Solution

The fourth proportional to 10,072.78, 15,111.56 and 9,905.44 is: 14,860.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,072.78 : 15,111.56 = 9,905.44 : x
  2. Step 2: Convert to fraction form
    10,072.78/15,111.56 = 9,905.44/x
  3. Step 3: Cross multiply
    10,072.78x = 15,111.56 × 9,905.44
  4. Step 4: Simplify right side
    10,072.78x = 149,686,650.89
  5. Step 5: Solve for x
    x = 149,686,650.89/10,072.78
  6. Step 6: Final answer
    x = 14,860.51

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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.