Home / 7,778.95-11,666.27-2,155.28

Finding the Fourth Proportional to 7,778.95, 11,666.27 and 2,155.28

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Solution

The fourth proportional to 7,778.95, 11,666.27 and 2,155.28 is: 3,232.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,778.95 : 11,666.27 = 2,155.28 : x
  2. Step 2: Convert to fraction form
    7,778.95/11,666.27 = 2,155.28/x
  3. Step 3: Cross multiply
    7,778.95x = 11,666.27 × 2,155.28
  4. Step 4: Simplify right side
    7,778.95x = 25,144,078.41
  5. Step 5: Solve for x
    x = 25,144,078.41/7,778.95
  6. Step 6: Final answer
    x = 3,232.32

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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.