Home / 21,458.90-29,613.64-11,899.19

Finding the Fourth Proportional to 21,458.90, 29,613.64 and 11,899.19

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Solution

The fourth proportional to 21,458.90, 29,613.64 and 11,899.19 is: 16,421.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,458.90 : 29,613.64 = 11,899.19 : x
  2. Step 2: Convert to fraction form
    21,458.90/29,613.64 = 11,899.19/x
  3. Step 3: Cross multiply
    21,458.90x = 29,613.64 × 11,899.19
  4. Step 4: Simplify right side
    21,458.90x = 352,378,328.95
  5. Step 5: Solve for x
    x = 352,378,328.95/21,458.90
  6. Step 6: Final answer
    x = 16,421.08

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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.