Home / 21,878.15-30,181.33-14,321.15

Finding the Fourth Proportional to 21,878.15, 30,181.33 and 14,321.15

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Solution

The fourth proportional to 21,878.15, 30,181.33 and 14,321.15 is: 19,756.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,878.15 : 30,181.33 = 14,321.15 : x
  2. Step 2: Convert to fraction form
    21,878.15/30,181.33 = 14,321.15/x
  3. Step 3: Cross multiply
    21,878.15x = 30,181.33 × 14,321.15
  4. Step 4: Simplify right side
    21,878.15x = 432,231,354.13
  5. Step 5: Solve for x
    x = 432,231,354.13/21,878.15
  6. Step 6: Final answer
    x = 19,756.30

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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.