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Finding the Fourth Proportional to 15,660.80, 21,617.80 and 10,362.88

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Solution

The fourth proportional to 15,660.80, 21,617.80 and 10,362.88 is: 14,304.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.80 : 21,617.80 = 10,362.88 : x
  2. Step 2: Convert to fraction form
    15,660.80/21,617.80 = 10,362.88/x
  3. Step 3: Cross multiply
    15,660.80x = 21,617.80 × 10,362.88
  4. Step 4: Simplify right side
    15,660.80x = 224,022,667.26
  5. Step 5: Solve for x
    x = 224,022,667.26/15,660.80
  6. Step 6: Final answer
    x = 14,304.68

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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.