Home / 11,152.80-15,390.12-6,678.60

Finding the Fourth Proportional to 11,152.80, 15,390.12 and 6,678.60

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Solution

The fourth proportional to 11,152.80, 15,390.12 and 6,678.60 is: 9,216.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,152.80 : 15,390.12 = 6,678.60 : x
  2. Step 2: Convert to fraction form
    11,152.80/15,390.12 = 6,678.60/x
  3. Step 3: Cross multiply
    11,152.80x = 15,390.12 × 6,678.60
  4. Step 4: Simplify right side
    11,152.80x = 102,784,455.43
  5. Step 5: Solve for x
    x = 102,784,455.43/11,152.80
  6. Step 6: Final answer
    x = 9,216.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.