Home / 28,429.60-42,682.80-18,061.60

Finding the Fourth Proportional to 28,429.60, 42,682.80 and 18,061.60

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Solution

The fourth proportional to 28,429.60, 42,682.80 and 18,061.60 is: 27,116.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,429.60 : 42,682.80 = 18,061.60 : x
  2. Step 2: Convert to fraction form
    28,429.60/42,682.80 = 18,061.60/x
  3. Step 3: Cross multiply
    28,429.60x = 42,682.80 × 18,061.60
  4. Step 4: Simplify right side
    28,429.60x = 770,919,660.48
  5. Step 5: Solve for x
    x = 770,919,660.48/28,429.60
  6. Step 6: Final answer
    x = 27,116.80

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1.5x scale

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.