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Finding the Fourth Proportional to 18,819.60, 28,220.04 and 8,424.24

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Solution

The fourth proportional to 18,819.60, 28,220.04 and 8,424.24 is: 12,632.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.60 : 28,220.04 = 8,424.24 : x
  2. Step 2: Convert to fraction form
    18,819.60/28,220.04 = 8,424.24/x
  3. Step 3: Cross multiply
    18,819.60x = 28,220.04 × 8,424.24
  4. Step 4: Simplify right side
    18,819.60x = 237,732,389.77
  5. Step 5: Solve for x
    x = 237,732,389.77/18,819.60
  6. Step 6: Final answer
    x = 12,632.17

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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.