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Finding the Fourth Proportional to 20,412.62, 30,624.06 and 9,887.68

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Solution

The fourth proportional to 20,412.62, 30,624.06 and 9,887.68 is: 14,834.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.62 : 30,624.06 = 9,887.68 : x
  2. Step 2: Convert to fraction form
    20,412.62/30,624.06 = 9,887.68/x
  3. Step 3: Cross multiply
    20,412.62x = 30,624.06 × 9,887.68
  4. Step 4: Simplify right side
    20,412.62x = 302,800,905.58
  5. Step 5: Solve for x
    x = 302,800,905.58/20,412.62
  6. Step 6: Final answer
    x = 14,834.00

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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.