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Finding the Fourth Proportional to 30,615.66, 45,935.01 and 20,847.06

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Solution

The fourth proportional to 30,615.66, 45,935.01 and 20,847.06 is: 31,278.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,615.66 : 45,935.01 = 20,847.06 : x
  2. Step 2: Convert to fraction form
    30,615.66/45,935.01 = 20,847.06/x
  3. Step 3: Cross multiply
    30,615.66x = 45,935.01 × 20,847.06
  4. Step 4: Simplify right side
    30,615.66x = 957,609,909.57
  5. Step 5: Solve for x
    x = 957,609,909.57/30,615.66
  6. Step 6: Final answer
    x = 31,278.43

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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.