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Finding the Fourth Proportional to 15,653.68, 21,604.29 and 9,687.27

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Solution

The fourth proportional to 15,653.68, 21,604.29 and 9,687.27 is: 13,369.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.68 : 21,604.29 = 9,687.27 : x
  2. Step 2: Convert to fraction form
    15,653.68/21,604.29 = 9,687.27/x
  3. Step 3: Cross multiply
    15,653.68x = 21,604.29 × 9,687.27
  4. Step 4: Simplify right side
    15,653.68x = 209,286,590.39
  5. Step 5: Solve for x
    x = 209,286,590.39/15,653.68
  6. Step 6: Final answer
    x = 13,369.80

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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.