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Finding the Fourth Proportional to 20,602.84, 30,909.66 and 8,913.32

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Solution

The fourth proportional to 20,602.84, 30,909.66 and 8,913.32 is: 13,372.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.84 : 30,909.66 = 8,913.32 : x
  2. Step 2: Convert to fraction form
    20,602.84/30,909.66 = 8,913.32/x
  3. Step 3: Cross multiply
    20,602.84x = 30,909.66 × 8,913.32
  4. Step 4: Simplify right side
    20,602.84x = 275,507,690.67
  5. Step 5: Solve for x
    x = 275,507,690.67/20,602.84
  6. Step 6: Final answer
    x = 13,372.32

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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.