Home / 7,851.78-11,776.95-2,657.34

Finding the Fourth Proportional to 7,851.78, 11,776.95 and 2,657.34

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Solution

The fourth proportional to 7,851.78, 11,776.95 and 2,657.34 is: 3,985.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,851.78 : 11,776.95 = 2,657.34 : x
  2. Step 2: Convert to fraction form
    7,851.78/11,776.95 = 2,657.34/x
  3. Step 3: Cross multiply
    7,851.78x = 11,776.95 × 2,657.34
  4. Step 4: Simplify right side
    7,851.78x = 31,295,360.31
  5. Step 5: Solve for x
    x = 31,295,360.31/7,851.78
  6. Step 6: Final answer
    x = 3,985.77

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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.