Home / 7,878.08-11,767.24-6,128.48

Finding the Fourth Proportional to 7,878.08, 11,767.24 and 6,128.48

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Solution

The fourth proportional to 7,878.08, 11,767.24 and 6,128.48 is: 9,153.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.08 : 11,767.24 = 6,128.48 : x
  2. Step 2: Convert to fraction form
    7,878.08/11,767.24 = 6,128.48/x
  3. Step 3: Cross multiply
    7,878.08x = 11,767.24 × 6,128.48
  4. Step 4: Simplify right side
    7,878.08x = 72,115,295.00
  5. Step 5: Solve for x
    x = 72,115,295.00/7,878.08
  6. Step 6: Final answer
    x = 9,153.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.