Home / 20,136.28-27,783.59-12,178.34

Finding the Fourth Proportional to 20,136.28, 27,783.59 and 12,178.34

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Solution

The fourth proportional to 20,136.28, 27,783.59 and 12,178.34 is: 16,803.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.28 : 27,783.59 = 12,178.34 : x
  2. Step 2: Convert to fraction form
    20,136.28/27,783.59 = 12,178.34/x
  3. Step 3: Cross multiply
    20,136.28x = 27,783.59 × 12,178.34
  4. Step 4: Simplify right side
    20,136.28x = 338,358,005.44
  5. Step 5: Solve for x
    x = 338,358,005.44/20,136.28
  6. Step 6: Final answer
    x = 16,803.40

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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.