Home / 20,958.13-28,934.18-13,894.12

Finding the Fourth Proportional to 20,958.13, 28,934.18 and 13,894.12

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Solution

The fourth proportional to 20,958.13, 28,934.18 and 13,894.12 is: 19,181.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.13 : 28,934.18 = 13,894.12 : x
  2. Step 2: Convert to fraction form
    20,958.13/28,934.18 = 13,894.12/x
  3. Step 3: Cross multiply
    20,958.13x = 28,934.18 × 13,894.12
  4. Step 4: Simplify right side
    20,958.13x = 402,014,969.02
  5. Step 5: Solve for x
    x = 402,014,969.02/20,958.13
  6. Step 6: Final answer
    x = 19,181.81

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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.