Home / 13,431.77-20,151.69-5,422.42

Finding the Fourth Proportional to 13,431.77, 20,151.69 and 5,422.42

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Solution

The fourth proportional to 13,431.77, 20,151.69 and 5,422.42 is: 8,135.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.77 : 20,151.69 = 5,422.42 : x
  2. Step 2: Convert to fraction form
    13,431.77/20,151.69 = 5,422.42/x
  3. Step 3: Cross multiply
    13,431.77x = 20,151.69 × 5,422.42
  4. Step 4: Simplify right side
    13,431.77x = 109,270,875.07
  5. Step 5: Solve for x
    x = 109,270,875.07/13,431.77
  6. Step 6: Final answer
    x = 8,135.25

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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.