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Finding the Fourth Proportional to 8,718.78, 12,023.94 and 6,486.24

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Solution

The fourth proportional to 8,718.78, 12,023.94 and 6,486.24 is: 8,945.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.78 : 12,023.94 = 6,486.24 : x
  2. Step 2: Convert to fraction form
    8,718.78/12,023.94 = 6,486.24/x
  3. Step 3: Cross multiply
    8,718.78x = 12,023.94 × 6,486.24
  4. Step 4: Simplify right side
    8,718.78x = 77,990,160.59
  5. Step 5: Solve for x
    x = 77,990,160.59/8,718.78
  6. Step 6: Final answer
    x = 8,945.08

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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.