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Finding the Fourth Proportional to 15,559.59, 21,471.98 and 8,485.59

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Solution

The fourth proportional to 15,559.59, 21,471.98 and 8,485.59 is: 11,709.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,559.59 : 21,471.98 = 8,485.59 : x
  2. Step 2: Convert to fraction form
    15,559.59/21,471.98 = 8,485.59/x
  3. Step 3: Cross multiply
    15,559.59x = 21,471.98 × 8,485.59
  4. Step 4: Simplify right side
    15,559.59x = 182,202,376.34
  5. Step 5: Solve for x
    x = 182,202,376.34/15,559.59
  6. Step 6: Final answer
    x = 11,709.97

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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.