Home / 13,490.87-20,227.55-6,470.73

Finding the Fourth Proportional to 13,490.87, 20,227.55 and 6,470.73

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Solution

The fourth proportional to 13,490.87, 20,227.55 and 6,470.73 is: 9,701.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,490.87 : 20,227.55 = 6,470.73 : x
  2. Step 2: Convert to fraction form
    13,490.87/20,227.55 = 6,470.73/x
  3. Step 3: Cross multiply
    13,490.87x = 20,227.55 × 6,470.73
  4. Step 4: Simplify right side
    13,490.87x = 130,886,982.26
  5. Step 5: Solve for x
    x = 130,886,982.26/13,490.87
  6. Step 6: Final answer
    x = 9,701.90

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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.