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Finding the Fourth Proportional to 18,903.96, 28,356.84 and 6,424.56

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Solution

The fourth proportional to 18,903.96, 28,356.84 and 6,424.56 is: 9,637.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.96 : 28,356.84 = 6,424.56 : x
  2. Step 2: Convert to fraction form
    18,903.96/28,356.84 = 6,424.56/x
  3. Step 3: Cross multiply
    18,903.96x = 28,356.84 × 6,424.56
  4. Step 4: Simplify right side
    18,903.96x = 182,180,219.99
  5. Step 5: Solve for x
    x = 182,180,219.99/18,903.96
  6. Step 6: Final answer
    x = 9,637.15

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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.