Home / 7,851.28-11,778.54-2,657.56

Finding the Fourth Proportional to 7,851.28, 11,778.54 and 2,657.56

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Solution

The fourth proportional to 7,851.28, 11,778.54 and 2,657.56 is: 3,986.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,851.28 : 11,778.54 = 2,657.56 : x
  2. Step 2: Convert to fraction form
    7,851.28/11,778.54 = 2,657.56/x
  3. Step 3: Cross multiply
    7,851.28x = 11,778.54 × 2,657.56
  4. Step 4: Simplify right side
    7,851.28x = 31,302,176.76
  5. Step 5: Solve for x
    x = 31,302,176.76/7,851.28
  6. Step 6: Final answer
    x = 3,986.89

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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.