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Finding the Fourth Proportional to 18,686.64, 27,991.64 and 14,968.74

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Solution

The fourth proportional to 18,686.64, 27,991.64 and 14,968.74 is: 22,422.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.64 : 27,991.64 = 14,968.74 : x
  2. Step 2: Convert to fraction form
    18,686.64/27,991.64 = 14,968.74/x
  3. Step 3: Cross multiply
    18,686.64x = 27,991.64 × 14,968.74
  4. Step 4: Simplify right side
    18,686.64x = 418,999,581.33
  5. Step 5: Solve for x
    x = 418,999,581.33/18,686.64
  6. Step 6: Final answer
    x = 22,422.41

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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.