Home / 13,515.30-18,639.45-12,727.98

Finding the Fourth Proportional to 13,515.30, 18,639.45 and 12,727.98

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Solution

The fourth proportional to 13,515.30, 18,639.45 and 12,727.98 is: 17,553.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.30 : 18,639.45 = 12,727.98 : x
  2. Step 2: Convert to fraction form
    13,515.30/18,639.45 = 12,727.98/x
  3. Step 3: Cross multiply
    13,515.30x = 18,639.45 × 12,727.98
  4. Step 4: Simplify right side
    13,515.30x = 237,242,546.81
  5. Step 5: Solve for x
    x = 237,242,546.81/13,515.30
  6. Step 6: Final answer
    x = 17,553.63

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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.