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Finding the Fourth Proportional to 18,384.48, 27,581.04 and 7,999.20

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Solution

The fourth proportional to 18,384.48, 27,581.04 and 7,999.20 is: 12,000.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,384.48 : 27,581.04 = 7,999.20 : x
  2. Step 2: Convert to fraction form
    18,384.48/27,581.04 = 7,999.20/x
  3. Step 3: Cross multiply
    18,384.48x = 27,581.04 × 7,999.20
  4. Step 4: Simplify right side
    18,384.48x = 220,626,255.17
  5. Step 5: Solve for x
    x = 220,626,255.17/18,384.48
  6. Step 6: Final answer
    x = 12,000.68

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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.