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Finding the Fourth Proportional to 8,879.16, 12,249.18 and 5,151

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Solution

The fourth proportional to 8,879.16, 12,249.18 and 5,151 is: 7,106.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.16 : 12,249.18 = 5,151 : x
  2. Step 2: Convert to fraction form
    8,879.16/12,249.18 = 5,151/x
  3. Step 3: Cross multiply
    8,879.16x = 12,249.18 × 5,151
  4. Step 4: Simplify right side
    8,879.16x = 63,095,526.18
  5. Step 5: Solve for x
    x = 63,095,526.18/8,879.16
  6. Step 6: Final answer
    x = 7,106.02

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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.