Home / 20,969.21-28,934.28-12,471.17

Finding the Fourth Proportional to 20,969.21, 28,934.28 and 12,471.17

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Solution

The fourth proportional to 20,969.21, 28,934.28 and 12,471.17 is: 17,208.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.21 : 28,934.28 = 12,471.17 : x
  2. Step 2: Convert to fraction form
    20,969.21/28,934.28 = 12,471.17/x
  3. Step 3: Cross multiply
    20,969.21x = 28,934.28 × 12,471.17
  4. Step 4: Simplify right side
    20,969.21x = 360,844,180.04
  5. Step 5: Solve for x
    x = 360,844,180.04/20,969.21
  6. Step 6: Final answer
    x = 17,208.28

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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.