Home / 20,619.54-28,455.29-11,188.10

Finding the Fourth Proportional to 20,619.54, 28,455.29 and 11,188.10

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Solution

The fourth proportional to 20,619.54, 28,455.29 and 11,188.10 is: 15,439.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.54 : 28,455.29 = 11,188.10 : x
  2. Step 2: Convert to fraction form
    20,619.54/28,455.29 = 11,188.10/x
  3. Step 3: Cross multiply
    20,619.54x = 28,455.29 × 11,188.10
  4. Step 4: Simplify right side
    20,619.54x = 318,360,658.02
  5. Step 5: Solve for x
    x = 318,360,658.02/20,619.54
  6. Step 6: Final answer
    x = 15,439.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.