Home / 21,459.30-29,613.69-11,899.18

Finding the Fourth Proportional to 21,459.30, 29,613.69 and 11,899.18

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Solution

The fourth proportional to 21,459.30, 29,613.69 and 11,899.18 is: 16,420.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.30 : 29,613.69 = 11,899.18 : x
  2. Step 2: Convert to fraction form
    21,459.30/29,613.69 = 11,899.18/x
  3. Step 3: Cross multiply
    21,459.30x = 29,613.69 × 11,899.18
  4. Step 4: Simplify right side
    21,459.30x = 352,378,689.70
  5. Step 5: Solve for x
    x = 352,378,689.70/21,459.30
  6. Step 6: Final answer
    x = 16,420.79

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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.