Home / 21,308.74-29,403.20-12,923.62

Finding the Fourth Proportional to 21,308.74, 29,403.20 and 12,923.62

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Solution

The fourth proportional to 21,308.74, 29,403.20 and 12,923.62 is: 17,832.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.74 : 29,403.20 = 12,923.62 : x
  2. Step 2: Convert to fraction form
    21,308.74/29,403.20 = 12,923.62/x
  3. Step 3: Cross multiply
    21,308.74x = 29,403.20 × 12,923.62
  4. Step 4: Simplify right side
    21,308.74x = 379,995,783.58
  5. Step 5: Solve for x
    x = 379,995,783.58/21,308.74
  6. Step 6: Final answer
    x = 17,832.86

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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.