Home / 21,137.40-29,169.91-12,184.74

Finding the Fourth Proportional to 21,137.40, 29,169.91 and 12,184.74

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Solution

The fourth proportional to 21,137.40, 29,169.91 and 12,184.74 is: 16,815.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.40 : 29,169.91 = 12,184.74 : x
  2. Step 2: Convert to fraction form
    21,137.40/29,169.91 = 12,184.74/x
  3. Step 3: Cross multiply
    21,137.40x = 29,169.91 × 12,184.74
  4. Step 4: Simplify right side
    21,137.40x = 355,427,592.86
  5. Step 5: Solve for x
    x = 355,427,592.86/21,137.40
  6. Step 6: Final answer
    x = 16,815.11

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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.