Home / 12,428.70-18,642.52-8,470.06

Finding the Fourth Proportional to 12,428.70, 18,642.52 and 8,470.06

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Solution

The fourth proportional to 12,428.70, 18,642.52 and 8,470.06 is: 12,704.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.70 : 18,642.52 = 8,470.06 : x
  2. Step 2: Convert to fraction form
    12,428.70/18,642.52 = 8,470.06/x
  3. Step 3: Cross multiply
    12,428.70x = 18,642.52 × 8,470.06
  4. Step 4: Simplify right side
    12,428.70x = 157,903,262.95
  5. Step 5: Solve for x
    x = 157,903,262.95/12,428.70
  6. Step 6: Final answer
    x = 12,704.73

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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.