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Finding the Fourth Proportional to 14,945.70, 20,626.08 and 9,901.20

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Solution

The fourth proportional to 14,945.70, 20,626.08 and 9,901.20 is: 13,664.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,945.70 : 20,626.08 = 9,901.20 : x
  2. Step 2: Convert to fraction form
    14,945.70/20,626.08 = 9,901.20/x
  3. Step 3: Cross multiply
    14,945.70x = 20,626.08 × 9,901.20
  4. Step 4: Simplify right side
    14,945.70x = 204,222,943.30
  5. Step 5: Solve for x
    x = 204,222,943.30/14,945.70
  6. Step 6: Final answer
    x = 13,664.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.