Home / 13,197.90-19,685.64-12,279.36

Finding the Fourth Proportional to 13,197.90, 19,685.64 and 12,279.36

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Solution

The fourth proportional to 13,197.90, 19,685.64 and 12,279.36 is: 18,315.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,197.90 : 19,685.64 = 12,279.36 : x
  2. Step 2: Convert to fraction form
    13,197.90/19,685.64 = 12,279.36/x
  3. Step 3: Cross multiply
    13,197.90x = 19,685.64 × 12,279.36
  4. Step 4: Simplify right side
    13,197.90x = 241,727,060.39
  5. Step 5: Solve for x
    x = 241,727,060.39/13,197.90
  6. Step 6: Final answer
    x = 18,315.57

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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.