Home / 20,106.20-27,746.05-11,153.90

Finding the Fourth Proportional to 20,106.20, 27,746.05 and 11,153.90

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Solution

The fourth proportional to 20,106.20, 27,746.05 and 11,153.90 is: 15,392.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.20 : 27,746.05 = 11,153.90 : x
  2. Step 2: Convert to fraction form
    20,106.20/27,746.05 = 11,153.90/x
  3. Step 3: Cross multiply
    20,106.20x = 27,746.05 × 11,153.90
  4. Step 4: Simplify right side
    20,106.20x = 309,476,667.10
  5. Step 5: Solve for x
    x = 309,476,667.10/20,106.20
  6. Step 6: Final answer
    x = 15,392.10

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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.