Home / 21,520.83-29,701.51-12,091.21

Finding the Fourth Proportional to 21,520.83, 29,701.51 and 12,091.21

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Solution

The fourth proportional to 21,520.83, 29,701.51 and 12,091.21 is: 16,687.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.83 : 29,701.51 = 12,091.21 : x
  2. Step 2: Convert to fraction form
    21,520.83/29,701.51 = 12,091.21/x
  3. Step 3: Cross multiply
    21,520.83x = 29,701.51 × 12,091.21
  4. Step 4: Simplify right side
    21,520.83x = 359,127,224.96
  5. Step 5: Solve for x
    x = 359,127,224.96/21,520.83
  6. Step 6: Final answer
    x = 16,687.43

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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.