Home / 28,659.20-42,971.52-13,089.92

Finding the Fourth Proportional to 28,659.20, 42,971.52 and 13,089.92

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Solution

The fourth proportional to 28,659.20, 42,971.52 and 13,089.92 is: 19,626.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,659.20 : 42,971.52 = 13,089.92 : x
  2. Step 2: Convert to fraction form
    28,659.20/42,971.52 = 13,089.92/x
  3. Step 3: Cross multiply
    28,659.20x = 42,971.52 × 13,089.92
  4. Step 4: Simplify right side
    28,659.20x = 562,493,759.08
  5. Step 5: Solve for x
    x = 562,493,759.08/28,659.20
  6. Step 6: Final answer
    x = 19,626.99

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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.