Home / 21,520.58-29,701.17-12,090.96

Finding the Fourth Proportional to 21,520.58, 29,701.17 and 12,090.96

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Solution

The fourth proportional to 21,520.58, 29,701.17 and 12,090.96 is: 16,687.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.58 : 29,701.17 = 12,090.96 : x
  2. Step 2: Convert to fraction form
    21,520.58/29,701.17 = 12,090.96/x
  3. Step 3: Cross multiply
    21,520.58x = 29,701.17 × 12,090.96
  4. Step 4: Simplify right side
    21,520.58x = 359,115,613.08
  5. Step 5: Solve for x
    x = 359,115,613.08/21,520.58
  6. Step 6: Final answer
    x = 16,687.08

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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.