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Finding the Fourth Proportional to 20,439.41, 30,616.02 and 9,355.41

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Solution

The fourth proportional to 20,439.41, 30,616.02 and 9,355.41 is: 14,013.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.41 : 30,616.02 = 9,355.41 : x
  2. Step 2: Convert to fraction form
    20,439.41/30,616.02 = 9,355.41/x
  3. Step 3: Cross multiply
    20,439.41x = 30,616.02 × 9,355.41
  4. Step 4: Simplify right side
    20,439.41x = 286,425,419.67
  5. Step 5: Solve for x
    x = 286,425,419.67/20,439.41
  6. Step 6: Final answer
    x = 14,013.39

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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.