Home / 21,117.96-29,142.66-12,162.12

Finding the Fourth Proportional to 21,117.96, 29,142.66 and 12,162.12

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Solution

The fourth proportional to 21,117.96, 29,142.66 and 12,162.12 is: 16,783.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.96 : 29,142.66 = 12,162.12 : x
  2. Step 2: Convert to fraction form
    21,117.96/29,142.66 = 12,162.12/x
  3. Step 3: Cross multiply
    21,117.96x = 29,142.66 × 12,162.12
  4. Step 4: Simplify right side
    21,117.96x = 354,436,528.04
  5. Step 5: Solve for x
    x = 354,436,528.04/21,117.96
  6. Step 6: Final answer
    x = 16,783.65

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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.