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Finding the Fourth Proportional to 18,385.80, 27,579.60 and 9,637.80

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Solution

The fourth proportional to 18,385.80, 27,579.60 and 9,637.80 is: 14,457.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,385.80 : 27,579.60 = 9,637.80 : x
  2. Step 2: Convert to fraction form
    18,385.80/27,579.60 = 9,637.80/x
  3. Step 3: Cross multiply
    18,385.80x = 27,579.60 × 9,637.80
  4. Step 4: Simplify right side
    18,385.80x = 265,806,668.88
  5. Step 5: Solve for x
    x = 265,806,668.88/18,385.80
  6. Step 6: Final answer
    x = 14,457.17

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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.