Home / 21,397.86-29,529.09-11,966.58

Finding the Fourth Proportional to 21,397.86, 29,529.09 and 11,966.58

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Solution

The fourth proportional to 21,397.86, 29,529.09 and 11,966.58 is: 16,513.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,397.86 : 29,529.09 = 11,966.58 : x
  2. Step 2: Convert to fraction form
    21,397.86/29,529.09 = 11,966.58/x
  3. Step 3: Cross multiply
    21,397.86x = 29,529.09 × 11,966.58
  4. Step 4: Simplify right side
    21,397.86x = 353,362,217.81
  5. Step 5: Solve for x
    x = 353,362,217.81/21,397.86
  6. Step 6: Final answer
    x = 16,513.90

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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.