Home / 21,613.56-29,822.18-13,120.12

Finding the Fourth Proportional to 21,613.56, 29,822.18 and 13,120.12

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Solution

The fourth proportional to 21,613.56, 29,822.18 and 13,120.12 is: 18,103.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,613.56 : 29,822.18 = 13,120.12 : x
  2. Step 2: Convert to fraction form
    21,613.56/29,822.18 = 13,120.12/x
  3. Step 3: Cross multiply
    21,613.56x = 29,822.18 × 13,120.12
  4. Step 4: Simplify right side
    21,613.56x = 391,270,580.26
  5. Step 5: Solve for x
    x = 391,270,580.26/21,613.56
  6. Step 6: Final answer
    x = 18,103.01

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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.