Home / 21,869.58-30,179.14-12,919.96

Finding the Fourth Proportional to 21,869.58, 30,179.14 and 12,919.96

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Solution

The fourth proportional to 21,869.58, 30,179.14 and 12,919.96 is: 17,829.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.58 : 30,179.14 = 12,919.96 : x
  2. Step 2: Convert to fraction form
    21,869.58/30,179.14 = 12,919.96/x
  3. Step 3: Cross multiply
    21,869.58x = 30,179.14 × 12,919.96
  4. Step 4: Simplify right side
    21,869.58x = 389,913,281.63
  5. Step 5: Solve for x
    x = 389,913,281.63/21,869.58
  6. Step 6: Final answer
    x = 17,829.02

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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.