Home / 28,419.20-42,628.80-15,977.60

Finding the Fourth Proportional to 28,419.20, 42,628.80 and 15,977.60

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Solution

The fourth proportional to 28,419.20, 42,628.80 and 15,977.60 is: 23,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,419.20 : 42,628.80 = 15,977.60 : x
  2. Step 2: Convert to fraction form
    28,419.20/42,628.80 = 15,977.60/x
  3. Step 3: Cross multiply
    28,419.20x = 42,628.80 × 15,977.60
  4. Step 4: Simplify right side
    28,419.20x = 681,105,914.88
  5. Step 5: Solve for x
    x = 681,105,914.88/28,419.20
  6. Step 6: Final answer
    x = 23,966.40

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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.