Home / 21,021.57-28,993.35-13,468.60

Finding the Fourth Proportional to 21,021.57, 28,993.35 and 13,468.60

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Solution

The fourth proportional to 21,021.57, 28,993.35 and 13,468.60 is: 18,576.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.57 : 28,993.35 = 13,468.60 : x
  2. Step 2: Convert to fraction form
    21,021.57/28,993.35 = 13,468.60/x
  3. Step 3: Cross multiply
    21,021.57x = 28,993.35 × 13,468.60
  4. Step 4: Simplify right side
    21,021.57x = 390,499,882.68
  5. Step 5: Solve for x
    x = 390,499,882.68/21,021.57
  6. Step 6: Final answer
    x = 18,576.15

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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.