Home / 18,953.56-28,430.45-4,912.61

Finding the Fourth Proportional to 18,953.56, 28,430.45 and 4,912.61

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Solution

The fourth proportional to 18,953.56, 28,430.45 and 4,912.61 is: 7,368.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.56 : 28,430.45 = 4,912.61 : x
  2. Step 2: Convert to fraction form
    18,953.56/28,430.45 = 4,912.61/x
  3. Step 3: Cross multiply
    18,953.56x = 28,430.45 × 4,912.61
  4. Step 4: Simplify right side
    18,953.56x = 139,667,688.41
  5. Step 5: Solve for x
    x = 139,667,688.41/18,953.56
  6. Step 6: Final answer
    x = 7,368.94

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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.