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Finding the Fourth Proportional to 18,959.18, 28,446.93 and 7,868.39

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Solution

The fourth proportional to 18,959.18, 28,446.93 and 7,868.39 is: 11,805.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.18 : 28,446.93 = 7,868.39 : x
  2. Step 2: Convert to fraction form
    18,959.18/28,446.93 = 7,868.39/x
  3. Step 3: Cross multiply
    18,959.18x = 28,446.93 × 7,868.39
  4. Step 4: Simplify right side
    18,959.18x = 223,831,397.31
  5. Step 5: Solve for x
    x = 223,831,397.31/18,959.18
  6. Step 6: Final answer
    x = 11,805.97

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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.