Home / 20,810.39-28,718.21-11,378.95

Finding the Fourth Proportional to 20,810.39, 28,718.21 and 11,378.95

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Solution

The fourth proportional to 20,810.39, 28,718.21 and 11,378.95 is: 15,702.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.39 : 28,718.21 = 11,378.95 : x
  2. Step 2: Convert to fraction form
    20,810.39/28,718.21 = 11,378.95/x
  3. Step 3: Cross multiply
    20,810.39x = 28,718.21 × 11,378.95
  4. Step 4: Simplify right side
    20,810.39x = 326,783,032.33
  5. Step 5: Solve for x
    x = 326,783,032.33/20,810.39
  6. Step 6: Final answer
    x = 15,702.88

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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.