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Finding the Fourth Proportional to 21,816.70, 30,116.28 and 14,752.70

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Solution

The fourth proportional to 21,816.70, 30,116.28 and 14,752.70 is: 20,364.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,816.70 : 30,116.28 = 14,752.70 : x
  2. Step 2: Convert to fraction form
    21,816.70/30,116.28 = 14,752.70/x
  3. Step 3: Cross multiply
    21,816.70x = 30,116.28 × 14,752.70
  4. Step 4: Simplify right side
    21,816.70x = 444,296,443.96
  5. Step 5: Solve for x
    x = 444,296,443.96/21,816.70
  6. Step 6: Final answer
    x = 20,364.97

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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.