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Finding the Fourth Proportional to 30,622.70, 45,945.51 and 20,854.10

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Solution

The fourth proportional to 30,622.70, 45,945.51 and 20,854.10 is: 31,288.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,622.70 : 45,945.51 = 20,854.10 : x
  2. Step 2: Convert to fraction form
    30,622.70/45,945.51 = 20,854.10/x
  3. Step 3: Cross multiply
    30,622.70x = 45,945.51 × 20,854.10
  4. Step 4: Simplify right side
    30,622.70x = 958,152,260.09
  5. Step 5: Solve for x
    x = 958,152,260.09/30,622.70
  6. Step 6: Final answer
    x = 31,288.95

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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.