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Finding the Fourth Proportional to 18,705.28, 28,044.95 and 7,015.36

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Solution

The fourth proportional to 18,705.28, 28,044.95 and 7,015.36 is: 10,518.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.28 : 28,044.95 = 7,015.36 : x
  2. Step 2: Convert to fraction form
    18,705.28/28,044.95 = 7,015.36/x
  3. Step 3: Cross multiply
    18,705.28x = 28,044.95 × 7,015.36
  4. Step 4: Simplify right side
    18,705.28x = 196,745,420.43
  5. Step 5: Solve for x
    x = 196,745,420.43/18,705.28
  6. Step 6: Final answer
    x = 10,518.18

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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.