Home / 12,879.36-19,280.16-9,117.72

Finding the Fourth Proportional to 12,879.36, 19,280.16 and 9,117.72

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Solution

The fourth proportional to 12,879.36, 19,280.16 and 9,117.72 is: 13,649.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.36 : 19,280.16 = 9,117.72 : x
  2. Step 2: Convert to fraction form
    12,879.36/19,280.16 = 9,117.72/x
  3. Step 3: Cross multiply
    12,879.36x = 19,280.16 × 9,117.72
  4. Step 4: Simplify right side
    12,879.36x = 175,791,100.44
  5. Step 5: Solve for x
    x = 175,791,100.44/12,879.36
  6. Step 6: Final answer
    x = 13,649.06

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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.