Home / 18,947.51-28,421.36-4,906.56

Finding the Fourth Proportional to 18,947.51, 28,421.36 and 4,906.56

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Solution

The fourth proportional to 18,947.51, 28,421.36 and 4,906.56 is: 7,359.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.51 : 28,421.36 = 4,906.56 : x
  2. Step 2: Convert to fraction form
    18,947.51/28,421.36 = 4,906.56/x
  3. Step 3: Cross multiply
    18,947.51x = 28,421.36 × 4,906.56
  4. Step 4: Simplify right side
    18,947.51x = 139,450,978.28
  5. Step 5: Solve for x
    x = 139,450,978.28/18,947.51
  6. Step 6: Final answer
    x = 7,359.86

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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.