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Finding the Fourth Proportional to 15,653.24, 21,597.42 and 9,687.80

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Solution

The fourth proportional to 15,653.24, 21,597.42 and 9,687.80 is: 13,366.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.24 : 21,597.42 = 9,687.80 : x
  2. Step 2: Convert to fraction form
    15,653.24/21,597.42 = 9,687.80/x
  3. Step 3: Cross multiply
    15,653.24x = 21,597.42 × 9,687.80
  4. Step 4: Simplify right side
    15,653.24x = 209,231,485.48
  5. Step 5: Solve for x
    x = 209,231,485.48/15,653.24
  6. Step 6: Final answer
    x = 13,366.66

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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.