Home / 20,291.81-30,444.55-12,786.66

Finding the Fourth Proportional to 20,291.81, 30,444.55 and 12,786.66

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Solution

The fourth proportional to 20,291.81, 30,444.55 and 12,786.66 is: 19,184.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,291.81 : 30,444.55 = 12,786.66 : x
  2. Step 2: Convert to fraction form
    20,291.81/30,444.55 = 12,786.66/x
  3. Step 3: Cross multiply
    20,291.81x = 30,444.55 × 12,786.66
  4. Step 4: Simplify right side
    20,291.81x = 389,283,989.45
  5. Step 5: Solve for x
    x = 389,283,989.45/20,291.81
  6. Step 6: Final answer
    x = 19,184.29

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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.