Home / 20,419.15-28,178.42-11,466.66

Finding the Fourth Proportional to 20,419.15, 28,178.42 and 11,466.66

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Solution

The fourth proportional to 20,419.15, 28,178.42 and 11,466.66 is: 15,823.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.15 : 28,178.42 = 11,466.66 : x
  2. Step 2: Convert to fraction form
    20,419.15/28,178.42 = 11,466.66/x
  3. Step 3: Cross multiply
    20,419.15x = 28,178.42 × 11,466.66
  4. Step 4: Simplify right side
    20,419.15x = 323,112,220.59
  5. Step 5: Solve for x
    x = 323,112,220.59/20,419.15
  6. Step 6: Final answer
    x = 15,823.98

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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.