Home / 12,678.67-17,478-8,890.41

Finding the Fourth Proportional to 12,678.67, 17,478 and 8,890.41

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Solution

The fourth proportional to 12,678.67, 17,478 and 8,890.41 is: 12,255.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.67 : 17,478 = 8,890.41 : x
  2. Step 2: Convert to fraction form
    12,678.67/17,478 = 8,890.41/x
  3. Step 3: Cross multiply
    12,678.67x = 17,478 × 8,890.41
  4. Step 4: Simplify right side
    12,678.67x = 155,386,585.98
  5. Step 5: Solve for x
    x = 155,386,585.98/12,678.67
  6. Step 6: Final answer
    x = 12,255.75

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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.