Home / 21,917.98-30,246.20-12,357.78

Finding the Fourth Proportional to 21,917.98, 30,246.20 and 12,357.78

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Solution

The fourth proportional to 21,917.98, 30,246.20 and 12,357.78 is: 17,053.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.98 : 30,246.20 = 12,357.78 : x
  2. Step 2: Convert to fraction form
    21,917.98/30,246.20 = 12,357.78/x
  3. Step 3: Cross multiply
    21,917.98x = 30,246.20 × 12,357.78
  4. Step 4: Simplify right side
    21,917.98x = 373,775,885.44
  5. Step 5: Solve for x
    x = 373,775,885.44/21,917.98
  6. Step 6: Final answer
    x = 17,053.40

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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.