Home / 28,172.20-42,258.30-17,829.80

Finding the Fourth Proportional to 28,172.20, 42,258.30 and 17,829.80

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Solution

The fourth proportional to 28,172.20, 42,258.30 and 17,829.80 is: 26,744.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.20 : 42,258.30 = 17,829.80 : x
  2. Step 2: Convert to fraction form
    28,172.20/42,258.30 = 17,829.80/x
  3. Step 3: Cross multiply
    28,172.20x = 42,258.30 × 17,829.80
  4. Step 4: Simplify right side
    28,172.20x = 753,457,037.34
  5. Step 5: Solve for x
    x = 753,457,037.34/28,172.20
  6. Step 6: Final answer
    x = 26,744.70

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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.