Home / 21,458.16-29,613.63-11,899.14

Finding the Fourth Proportional to 21,458.16, 29,613.63 and 11,899.14

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Solution

The fourth proportional to 21,458.16, 29,613.63 and 11,899.14 is: 16,421.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,458.16 : 29,613.63 = 11,899.14 : x
  2. Step 2: Convert to fraction form
    21,458.16/29,613.63 = 11,899.14/x
  3. Step 3: Cross multiply
    21,458.16x = 29,613.63 × 11,899.14
  4. Step 4: Simplify right side
    21,458.16x = 352,376,729.28
  5. Step 5: Solve for x
    x = 352,376,729.28/21,458.16
  6. Step 6: Final answer
    x = 16,421.57

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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.