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Finding the Fourth Proportional to 18,838.47, 28,223.25 and 8,824.83

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Solution

The fourth proportional to 18,838.47, 28,223.25 and 8,824.83 is: 13,221.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.47 : 28,223.25 = 8,824.83 : x
  2. Step 2: Convert to fraction form
    18,838.47/28,223.25 = 8,824.83/x
  3. Step 3: Cross multiply
    18,838.47x = 28,223.25 × 8,824.83
  4. Step 4: Simplify right side
    18,838.47x = 249,065,383.30
  5. Step 5: Solve for x
    x = 249,065,383.30/18,838.47
  6. Step 6: Final answer
    x = 13,221.10

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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.