Home / 21,148.35-29,184.57-12,195.78

Finding the Fourth Proportional to 21,148.35, 29,184.57 and 12,195.78

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Solution

The fourth proportional to 21,148.35, 29,184.57 and 12,195.78 is: 16,830.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.35 : 29,184.57 = 12,195.78 : x
  2. Step 2: Convert to fraction form
    21,148.35/29,184.57 = 12,195.78/x
  3. Step 3: Cross multiply
    21,148.35x = 29,184.57 × 12,195.78
  4. Step 4: Simplify right side
    21,148.35x = 355,928,595.11
  5. Step 5: Solve for x
    x = 355,928,595.11/21,148.35
  6. Step 6: Final answer
    x = 16,830.09

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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.