Home / 21,154.96-29,189.64-12,771.92

Finding the Fourth Proportional to 21,154.96, 29,189.64 and 12,771.92

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Solution

The fourth proportional to 21,154.96, 29,189.64 and 12,771.92 is: 17,622.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.96 : 29,189.64 = 12,771.92 : x
  2. Step 2: Convert to fraction form
    21,154.96/29,189.64 = 12,771.92/x
  3. Step 3: Cross multiply
    21,154.96x = 29,189.64 × 12,771.92
  4. Step 4: Simplify right side
    21,154.96x = 372,807,746.91
  5. Step 5: Solve for x
    x = 372,807,746.91/21,154.96
  6. Step 6: Final answer
    x = 17,622.71

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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.