Home / 21,765.15-30,024.84-14,215.90

Finding the Fourth Proportional to 21,765.15, 30,024.84 and 14,215.90

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Solution

The fourth proportional to 21,765.15, 30,024.84 and 14,215.90 is: 19,610.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,765.15 : 30,024.84 = 14,215.90 : x
  2. Step 2: Convert to fraction form
    21,765.15/30,024.84 = 14,215.90/x
  3. Step 3: Cross multiply
    21,765.15x = 30,024.84 × 14,215.90
  4. Step 4: Simplify right side
    21,765.15x = 426,830,051.88
  5. Step 5: Solve for x
    x = 426,830,051.88/21,765.15
  6. Step 6: Final answer
    x = 19,610.71

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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.