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Finding the Fourth Proportional to 18,588.80, 27,845.40 and 11,547.20

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Solution

The fourth proportional to 18,588.80, 27,845.40 and 11,547.20 is: 17,297.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,588.80 : 27,845.40 = 11,547.20 : x
  2. Step 2: Convert to fraction form
    18,588.80/27,845.40 = 11,547.20/x
  3. Step 3: Cross multiply
    18,588.80x = 27,845.40 × 11,547.20
  4. Step 4: Simplify right side
    18,588.80x = 321,536,402.88
  5. Step 5: Solve for x
    x = 321,536,402.88/18,588.80
  6. Step 6: Final answer
    x = 17,297.32

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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.