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Finding the Fourth Proportional to 30,423.60, 45,624.60 and 21,063.60

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Solution

The fourth proportional to 30,423.60, 45,624.60 and 21,063.60 is: 31,587.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,423.60 : 45,624.60 = 21,063.60 : x
  2. Step 2: Convert to fraction form
    30,423.60/45,624.60 = 21,063.60/x
  3. Step 3: Cross multiply
    30,423.60x = 45,624.60 × 21,063.60
  4. Step 4: Simplify right side
    30,423.60x = 961,018,324.56
  5. Step 5: Solve for x
    x = 961,018,324.56/30,423.60
  6. Step 6: Final answer
    x = 31,587.92

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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.