Home / 20,982.27-28,955.28-11,909.34

Finding the Fourth Proportional to 20,982.27, 28,955.28 and 11,909.34

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Solution

The fourth proportional to 20,982.27, 28,955.28 and 11,909.34 is: 16,434.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.27 : 28,955.28 = 11,909.34 : x
  2. Step 2: Convert to fraction form
    20,982.27/28,955.28 = 11,909.34/x
  3. Step 3: Cross multiply
    20,982.27x = 28,955.28 × 11,909.34
  4. Step 4: Simplify right side
    20,982.27x = 344,838,274.32
  5. Step 5: Solve for x
    x = 344,838,274.32/20,982.27
  6. Step 6: Final answer
    x = 16,434.75

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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.