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Finding the Fourth Proportional to 14,385.78, 21,581.73 and 8,148.78

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Solution

The fourth proportional to 14,385.78, 21,581.73 and 8,148.78 is: 12,224.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,385.78 : 21,581.73 = 8,148.78 : x
  2. Step 2: Convert to fraction form
    14,385.78/21,581.73 = 8,148.78/x
  3. Step 3: Cross multiply
    14,385.78x = 21,581.73 × 8,148.78
  4. Step 4: Simplify right side
    14,385.78x = 175,864,769.79
  5. Step 5: Solve for x
    x = 175,864,769.79/14,385.78
  6. Step 6: Final answer
    x = 12,224.90

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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.