Home / 28,430.20-42,645.30-18,580.60

Finding the Fourth Proportional to 28,430.20, 42,645.30 and 18,580.60

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Solution

The fourth proportional to 28,430.20, 42,645.30 and 18,580.60 is: 27,870.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.20 : 42,645.30 = 18,580.60 : x
  2. Step 2: Convert to fraction form
    28,430.20/42,645.30 = 18,580.60/x
  3. Step 3: Cross multiply
    28,430.20x = 42,645.30 × 18,580.60
  4. Step 4: Simplify right side
    28,430.20x = 792,375,261.18
  5. Step 5: Solve for x
    x = 792,375,261.18/28,430.20
  6. Step 6: Final answer
    x = 27,870.90

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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.