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Finding the Fourth Proportional to 15,069.71, 20,796.21 and 8,355.42

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Solution

The fourth proportional to 15,069.71, 20,796.21 and 8,355.42 is: 11,530.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,069.71 : 20,796.21 = 8,355.42 : x
  2. Step 2: Convert to fraction form
    15,069.71/20,796.21 = 8,355.42/x
  3. Step 3: Cross multiply
    15,069.71x = 20,796.21 × 8,355.42
  4. Step 4: Simplify right side
    15,069.71x = 173,761,068.96
  5. Step 5: Solve for x
    x = 173,761,068.96/15,069.71
  6. Step 6: Final answer
    x = 11,530.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.