Home / 21,398.85-29,530.40-11,967.44

Finding the Fourth Proportional to 21,398.85, 29,530.40 and 11,967.44

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Solution

The fourth proportional to 21,398.85, 29,530.40 and 11,967.44 is: 16,515.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.85 : 29,530.40 = 11,967.44 : x
  2. Step 2: Convert to fraction form
    21,398.85/29,530.40 = 11,967.44/x
  3. Step 3: Cross multiply
    21,398.85x = 29,530.40 × 11,967.44
  4. Step 4: Simplify right side
    21,398.85x = 353,403,082.69
  5. Step 5: Solve for x
    x = 353,403,082.69/21,398.85
  6. Step 6: Final answer
    x = 16,515.05

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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.