Home / 19,998.90-30,008.70-8,161.35

Finding the Fourth Proportional to 19,998.90, 30,008.70 and 8,161.35

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Solution

The fourth proportional to 19,998.90, 30,008.70 and 8,161.35 is: 12,246.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,998.90 : 30,008.70 = 8,161.35 : x
  2. Step 2: Convert to fraction form
    19,998.90/30,008.70 = 8,161.35/x
  3. Step 3: Cross multiply
    19,998.90x = 30,008.70 × 8,161.35
  4. Step 4: Simplify right side
    19,998.90x = 244,911,503.75
  5. Step 5: Solve for x
    x = 244,911,503.75/19,998.90
  6. Step 6: Final answer
    x = 12,246.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.