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Finding the Fourth Proportional to 13,297.92, 19,923.36 and 12,507.78

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Solution

The fourth proportional to 13,297.92, 19,923.36 and 12,507.78 is: 18,739.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,297.92 : 19,923.36 = 12,507.78 : x
  2. Step 2: Convert to fraction form
    13,297.92/19,923.36 = 12,507.78/x
  3. Step 3: Cross multiply
    13,297.92x = 19,923.36 × 12,507.78
  4. Step 4: Simplify right side
    13,297.92x = 249,197,003.74
  5. Step 5: Solve for x
    x = 249,197,003.74/13,297.92
  6. Step 6: Final answer
    x = 18,739.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.