Home / 21,281.29-29,371.44-12,788.14

Finding the Fourth Proportional to 21,281.29, 29,371.44 and 12,788.14

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Solution

The fourth proportional to 21,281.29, 29,371.44 and 12,788.14 is: 17,649.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.29 : 29,371.44 = 12,788.14 : x
  2. Step 2: Convert to fraction form
    21,281.29/29,371.44 = 12,788.14/x
  3. Step 3: Cross multiply
    21,281.29x = 29,371.44 × 12,788.14
  4. Step 4: Simplify right side
    21,281.29x = 375,606,086.72
  5. Step 5: Solve for x
    x = 375,606,086.72/21,281.29
  6. Step 6: Final answer
    x = 17,649.59

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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.