Home / 13,355.76-20,045.75-7,121.01

Finding the Fourth Proportional to 13,355.76, 20,045.75 and 7,121.01

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Solution

The fourth proportional to 13,355.76, 20,045.75 and 7,121.01 is: 10,687.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.76 : 20,045.75 = 7,121.01 : x
  2. Step 2: Convert to fraction form
    13,355.76/20,045.75 = 7,121.01/x
  3. Step 3: Cross multiply
    13,355.76x = 20,045.75 × 7,121.01
  4. Step 4: Simplify right side
    13,355.76x = 142,745,986.21
  5. Step 5: Solve for x
    x = 142,745,986.21/13,355.76
  6. Step 6: Final answer
    x = 10,687.97

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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.