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Finding the Fourth Proportional to 30,463.56, 45,672.18 and 21,078.63

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Solution

The fourth proportional to 30,463.56, 45,672.18 and 21,078.63 is: 31,601.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,463.56 : 45,672.18 = 21,078.63 : x
  2. Step 2: Convert to fraction form
    30,463.56/45,672.18 = 21,078.63/x
  3. Step 3: Cross multiply
    30,463.56x = 45,672.18 × 21,078.63
  4. Step 4: Simplify right side
    30,463.56x = 962,706,983.51
  5. Step 5: Solve for x
    x = 962,706,983.51/30,463.56
  6. Step 6: Final answer
    x = 31,601.92

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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.