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Finding the Fourth Proportional to 18,587.80, 27,903.30 and 9,818.20

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Solution

The fourth proportional to 18,587.80, 27,903.30 and 9,818.20 is: 14,738.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,587.80 : 27,903.30 = 9,818.20 : x
  2. Step 2: Convert to fraction form
    18,587.80/27,903.30 = 9,818.20/x
  3. Step 3: Cross multiply
    18,587.80x = 27,903.30 × 9,818.20
  4. Step 4: Simplify right side
    18,587.80x = 273,960,180.06
  5. Step 5: Solve for x
    x = 273,960,180.06/18,587.80
  6. Step 6: Final answer
    x = 14,738.71

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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.