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Finding the Fourth Proportional to 20,241.90, 30,368.80 and 10,388.06

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Solution

The fourth proportional to 20,241.90, 30,368.80 and 10,388.06 is: 15,585.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,241.90 : 30,368.80 = 10,388.06 : x
  2. Step 2: Convert to fraction form
    20,241.90/30,368.80 = 10,388.06/x
  3. Step 3: Cross multiply
    20,241.90x = 30,368.80 × 10,388.06
  4. Step 4: Simplify right side
    20,241.90x = 315,472,916.53
  5. Step 5: Solve for x
    x = 315,472,916.53/20,241.90
  6. Step 6: Final answer
    x = 15,585.14

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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.