Home / 20,809.26-28,717.29-11,378.52

Finding the Fourth Proportional to 20,809.26, 28,717.29 and 11,378.52

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Solution

The fourth proportional to 20,809.26, 28,717.29 and 11,378.52 is: 15,702.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.26 : 28,717.29 = 11,378.52 : x
  2. Step 2: Convert to fraction form
    20,809.26/28,717.29 = 11,378.52/x
  3. Step 3: Cross multiply
    20,809.26x = 28,717.29 × 11,378.52
  4. Step 4: Simplify right side
    20,809.26x = 326,760,258.61
  5. Step 5: Solve for x
    x = 326,760,258.61/20,809.26
  6. Step 6: Final answer
    x = 15,702.64

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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.