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Finding the Fourth Proportional to 13,119.16, 19,601.99 and 12,659.92

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Solution

The fourth proportional to 13,119.16, 19,601.99 and 12,659.92 is: 18,915.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.16 : 19,601.99 = 12,659.92 : x
  2. Step 2: Convert to fraction form
    13,119.16/19,601.99 = 12,659.92/x
  3. Step 3: Cross multiply
    13,119.16x = 19,601.99 × 12,659.92
  4. Step 4: Simplify right side
    13,119.16x = 248,159,625.24
  5. Step 5: Solve for x
    x = 248,159,625.24/13,119.16
  6. Step 6: Final answer
    x = 18,915.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.