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Finding the Fourth Proportional to 18,885.34, 28,328 and 8,994.63

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Solution

The fourth proportional to 18,885.34, 28,328 and 8,994.63 is: 13,491.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.34 : 28,328 = 8,994.63 : x
  2. Step 2: Convert to fraction form
    18,885.34/28,328 = 8,994.63/x
  3. Step 3: Cross multiply
    18,885.34x = 28,328 × 8,994.63
  4. Step 4: Simplify right side
    18,885.34x = 254,799,878.64
  5. Step 5: Solve for x
    x = 254,799,878.64/18,885.34
  6. Step 6: Final answer
    x = 13,491.94

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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.