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Finding the Fourth Proportional to 20,173.20, 30,259.80 and 15,565.20

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Solution

The fourth proportional to 20,173.20, 30,259.80 and 15,565.20 is: 23,347.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,173.20 : 30,259.80 = 15,565.20 : x
  2. Step 2: Convert to fraction form
    20,173.20/30,259.80 = 15,565.20/x
  3. Step 3: Cross multiply
    20,173.20x = 30,259.80 × 15,565.20
  4. Step 4: Simplify right side
    20,173.20x = 470,999,838.96
  5. Step 5: Solve for x
    x = 470,999,838.96/20,173.20
  6. Step 6: Final answer
    x = 23,347.80

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Half scale
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Double scale
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Similar ratio
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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.