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Finding the Fourth Proportional to 18,943.42, 28,415.14 and 18,916.09

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Solution

The fourth proportional to 18,943.42, 28,415.14 and 18,916.09 is: 28,374.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,943.42 : 28,415.14 = 18,916.09 : x
  2. Step 2: Convert to fraction form
    18,943.42/28,415.14 = 18,916.09/x
  3. Step 3: Cross multiply
    18,943.42x = 28,415.14 × 18,916.09
  4. Step 4: Simplify right side
    18,943.42x = 537,503,108.95
  5. Step 5: Solve for x
    x = 537,503,108.95/18,943.42
  6. Step 6: Final answer
    x = 28,374.13

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Similar ratio
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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.