Home / 20,489.76-30,744.36-12,186.15

Finding the Fourth Proportional to 20,489.76, 30,744.36 and 12,186.15

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Solution

The fourth proportional to 20,489.76, 30,744.36 and 12,186.15 is: 18,285.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.76 : 30,744.36 = 12,186.15 : x
  2. Step 2: Convert to fraction form
    20,489.76/30,744.36 = 12,186.15/x
  3. Step 3: Cross multiply
    20,489.76x = 30,744.36 × 12,186.15
  4. Step 4: Simplify right side
    20,489.76x = 374,655,267.32
  5. Step 5: Solve for x
    x = 374,655,267.32/20,489.76
  6. Step 6: Final answer
    x = 18,285.00

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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.