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Finding the Fourth Proportional to 20,009.70, 30,014.55 and 15,401.70

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Solution

The fourth proportional to 20,009.70, 30,014.55 and 15,401.70 is: 23,102.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,009.70 : 30,014.55 = 15,401.70 : x
  2. Step 2: Convert to fraction form
    20,009.70/30,014.55 = 15,401.70/x
  3. Step 3: Cross multiply
    20,009.70x = 30,014.55 × 15,401.70
  4. Step 4: Simplify right side
    20,009.70x = 462,275,094.74
  5. Step 5: Solve for x
    x = 462,275,094.74/20,009.70
  6. Step 6: Final answer
    x = 23,102.55

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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.