Home / 28,540.60-39,423.68-21,908.18

Finding the Fourth Proportional to 28,540.60, 39,423.68 and 21,908.18

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Solution

The fourth proportional to 28,540.60, 39,423.68 and 21,908.18 is: 30,262.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,540.60 : 39,423.68 = 21,908.18 : x
  2. Step 2: Convert to fraction form
    28,540.60/39,423.68 = 21,908.18/x
  3. Step 3: Cross multiply
    28,540.60x = 39,423.68 × 21,908.18
  4. Step 4: Simplify right side
    28,540.60x = 863,701,077.70
  5. Step 5: Solve for x
    x = 863,701,077.70/28,540.60
  6. Step 6: Final answer
    x = 30,262.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.