Home / 12,878.08-19,321.02-5,385.28

Finding the Fourth Proportional to 12,878.08, 19,321.02 and 5,385.28

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Solution

The fourth proportional to 12,878.08, 19,321.02 and 5,385.28 is: 8,079.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878.08 : 19,321.02 = 5,385.28 : x
  2. Step 2: Convert to fraction form
    12,878.08/19,321.02 = 5,385.28/x
  3. Step 3: Cross multiply
    12,878.08x = 19,321.02 × 5,385.28
  4. Step 4: Simplify right side
    12,878.08x = 104,049,102.59
  5. Step 5: Solve for x
    x = 104,049,102.59/12,878.08
  6. Step 6: Final answer
    x = 8,079.55

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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.