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Finding the Fourth Proportional to 18,274.84, 27,393.66 and 8,421.40

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Solution

The fourth proportional to 18,274.84, 27,393.66 and 8,421.40 is: 12,623.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,274.84 : 27,393.66 = 8,421.40 : x
  2. Step 2: Convert to fraction form
    18,274.84/27,393.66 = 8,421.40/x
  3. Step 3: Cross multiply
    18,274.84x = 27,393.66 × 8,421.40
  4. Step 4: Simplify right side
    18,274.84x = 230,692,968.32
  5. Step 5: Solve for x
    x = 230,692,968.32/18,274.84
  6. Step 6: Final answer
    x = 12,623.53

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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.