Home / 21,124.63-29,155.12-12,170.43

Finding the Fourth Proportional to 21,124.63, 29,155.12 and 12,170.43

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Solution

The fourth proportional to 21,124.63, 29,155.12 and 12,170.43 is: 16,796.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.63 : 29,155.12 = 12,170.43 : x
  2. Step 2: Convert to fraction form
    21,124.63/29,155.12 = 12,170.43/x
  3. Step 3: Cross multiply
    21,124.63x = 29,155.12 × 12,170.43
  4. Step 4: Simplify right side
    21,124.63x = 354,830,286.25
  5. Step 5: Solve for x
    x = 354,830,286.25/21,124.63
  6. Step 6: Final answer
    x = 16,796.99

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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.