Home / 20,386.35-28,133.21-11,894.31

Finding the Fourth Proportional to 20,386.35, 28,133.21 and 11,894.31

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Solution

The fourth proportional to 20,386.35, 28,133.21 and 11,894.31 is: 16,414.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.35 : 28,133.21 = 11,894.31 : x
  2. Step 2: Convert to fraction form
    20,386.35/28,133.21 = 11,894.31/x
  3. Step 3: Cross multiply
    20,386.35x = 28,133.21 × 11,894.31
  4. Step 4: Simplify right side
    20,386.35x = 334,625,121.04
  5. Step 5: Solve for x
    x = 334,625,121.04/20,386.35
  6. Step 6: Final answer
    x = 16,414.18

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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.