Home / 21,107.06-29,129.10-12,154.40

Finding the Fourth Proportional to 21,107.06, 29,129.10 and 12,154.40

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Solution

The fourth proportional to 21,107.06, 29,129.10 and 12,154.40 is: 16,773.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.06 : 29,129.10 = 12,154.40 : x
  2. Step 2: Convert to fraction form
    21,107.06/29,129.10 = 12,154.40/x
  3. Step 3: Cross multiply
    21,107.06x = 29,129.10 × 12,154.40
  4. Step 4: Simplify right side
    21,107.06x = 354,046,733.04
  5. Step 5: Solve for x
    x = 354,046,733.04/21,107.06
  6. Step 6: Final answer
    x = 16,773.85

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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.