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Finding the Fourth Proportional to 30,220.70, 41,710.54 and 19,311.86

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Solution

The fourth proportional to 30,220.70, 41,710.54 and 19,311.86 is: 26,654.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,220.70 : 41,710.54 = 19,311.86 : x
  2. Step 2: Convert to fraction form
    30,220.70/41,710.54 = 19,311.86/x
  3. Step 3: Cross multiply
    30,220.70x = 41,710.54 × 19,311.86
  4. Step 4: Simplify right side
    30,220.70x = 805,508,109.00
  5. Step 5: Solve for x
    x = 805,508,109.00/30,220.70
  6. Step 6: Final answer
    x = 26,654.18

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Half scale
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Double scale
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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.