Home / 20,890.63-31,362.66-17,947.90

Finding the Fourth Proportional to 20,890.63, 31,362.66 and 17,947.90

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Solution

The fourth proportional to 20,890.63, 31,362.66 and 17,947.90 is: 26,944.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.63 : 31,362.66 = 17,947.90 : x
  2. Step 2: Convert to fraction form
    20,890.63/31,362.66 = 17,947.90/x
  3. Step 3: Cross multiply
    20,890.63x = 31,362.66 × 17,947.90
  4. Step 4: Simplify right side
    20,890.63x = 562,893,807.01
  5. Step 5: Solve for x
    x = 562,893,807.01/20,890.63
  6. Step 6: Final answer
    x = 26,944.80

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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.