Home / 21,418.54-29,538.28-13,856.99

Finding the Fourth Proportional to 21,418.54, 29,538.28 and 13,856.99

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Solution

The fourth proportional to 21,418.54, 29,538.28 and 13,856.99 is: 19,110.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.54 : 29,538.28 = 13,856.99 : x
  2. Step 2: Convert to fraction form
    21,418.54/29,538.28 = 13,856.99/x
  3. Step 3: Cross multiply
    21,418.54x = 29,538.28 × 13,856.99
  4. Step 4: Simplify right side
    21,418.54x = 409,311,650.58
  5. Step 5: Solve for x
    x = 409,311,650.58/21,418.54
  6. Step 6: Final answer
    x = 19,110.16

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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.