Home / 21,977.16-30,321.30-12,543.88

Finding the Fourth Proportional to 21,977.16, 30,321.30 and 12,543.88

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Solution

The fourth proportional to 21,977.16, 30,321.30 and 12,543.88 is: 17,306.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.16 : 30,321.30 = 12,543.88 : x
  2. Step 2: Convert to fraction form
    21,977.16/30,321.30 = 12,543.88/x
  3. Step 3: Cross multiply
    21,977.16x = 30,321.30 × 12,543.88
  4. Step 4: Simplify right side
    21,977.16x = 380,346,748.64
  5. Step 5: Solve for x
    x = 380,346,748.64/21,977.16
  6. Step 6: Final answer
    x = 17,306.46

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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.