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Finding the Fourth Proportional to 15,559.81, 21,472.54 and 8,845.27

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Solution

The fourth proportional to 15,559.81, 21,472.54 and 8,845.27 is: 12,206.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,559.81 : 21,472.54 = 8,845.27 : x
  2. Step 2: Convert to fraction form
    15,559.81/21,472.54 = 8,845.27/x
  3. Step 3: Cross multiply
    15,559.81x = 21,472.54 × 8,845.27
  4. Step 4: Simplify right side
    15,559.81x = 189,930,338.09
  5. Step 5: Solve for x
    x = 189,930,338.09/15,559.81
  6. Step 6: Final answer
    x = 12,206.47

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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.