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Finding the Fourth Proportional to 15,559.58, 21,471.57 and 8,485.58

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Solution

The fourth proportional to 15,559.58, 21,471.57 and 8,485.58 is: 11,709.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,559.58 : 21,471.57 = 8,485.58 : x
  2. Step 2: Convert to fraction form
    15,559.58/21,471.57 = 8,485.58/x
  3. Step 3: Cross multiply
    15,559.58x = 21,471.57 × 8,485.58
  4. Step 4: Simplify right side
    15,559.58x = 182,198,724.96
  5. Step 5: Solve for x
    x = 182,198,724.96/15,559.58
  6. Step 6: Final answer
    x = 11,709.75

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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.