Home / 8,960.78-12,381.75-6,451.22

Finding the Fourth Proportional to 8,960.78, 12,381.75 and 6,451.22

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Solution

The fourth proportional to 8,960.78, 12,381.75 and 6,451.22 is: 8,914.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,960.78 : 12,381.75 = 6,451.22 : x
  2. Step 2: Convert to fraction form
    8,960.78/12,381.75 = 6,451.22/x
  3. Step 3: Cross multiply
    8,960.78x = 12,381.75 × 6,451.22
  4. Step 4: Simplify right side
    8,960.78x = 79,877,331.33
  5. Step 5: Solve for x
    x = 79,877,331.33/8,960.78
  6. Step 6: Final answer
    x = 8,914.11

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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.