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Finding the Fourth Proportional to 20,102.90, 30,154.35 and 14,918.90

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Solution

The fourth proportional to 20,102.90, 30,154.35 and 14,918.90 is: 22,378.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.90 : 30,154.35 = 14,918.90 : x
  2. Step 2: Convert to fraction form
    20,102.90/30,154.35 = 14,918.90/x
  3. Step 3: Cross multiply
    20,102.90x = 30,154.35 × 14,918.90
  4. Step 4: Simplify right side
    20,102.90x = 449,869,732.22
  5. Step 5: Solve for x
    x = 449,869,732.22/20,102.90
  6. Step 6: Final answer
    x = 22,378.35

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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.