Home / 13,218.48-19,800.72-7,378.20

Finding the Fourth Proportional to 13,218.48, 19,800.72 and 7,378.20

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Solution

The fourth proportional to 13,218.48, 19,800.72 and 7,378.20 is: 11,052.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.48 : 19,800.72 = 7,378.20 : x
  2. Step 2: Convert to fraction form
    13,218.48/19,800.72 = 7,378.20/x
  3. Step 3: Cross multiply
    13,218.48x = 19,800.72 × 7,378.20
  4. Step 4: Simplify right side
    13,218.48x = 146,093,672.30
  5. Step 5: Solve for x
    x = 146,093,672.30/13,218.48
  6. Step 6: Final answer
    x = 11,052.23

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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.