Home / 12,624.09-18,915.20-7,678.77

Finding the Fourth Proportional to 12,624.09, 18,915.20 and 7,678.77

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Solution

The fourth proportional to 12,624.09, 18,915.20 and 7,678.77 is: 11,505.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,624.09 : 18,915.20 = 7,678.77 : x
  2. Step 2: Convert to fraction form
    12,624.09/18,915.20 = 7,678.77/x
  3. Step 3: Cross multiply
    12,624.09x = 18,915.20 × 7,678.77
  4. Step 4: Simplify right side
    12,624.09x = 145,245,432.97
  5. Step 5: Solve for x
    x = 145,245,432.97/12,624.09
  6. Step 6: Final answer
    x = 11,505.42

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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.