Home / 13,173.09-19,665.73-12,711.66

Finding the Fourth Proportional to 13,173.09, 19,665.73 and 12,711.66

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Solution

The fourth proportional to 13,173.09, 19,665.73 and 12,711.66 is: 18,976.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,173.09 : 19,665.73 = 12,711.66 : x
  2. Step 2: Convert to fraction form
    13,173.09/19,665.73 = 12,711.66/x
  3. Step 3: Cross multiply
    13,173.09x = 19,665.73 × 12,711.66
  4. Step 4: Simplify right side
    13,173.09x = 249,984,073.41
  5. Step 5: Solve for x
    x = 249,984,073.41/13,173.09
  6. Step 6: Final answer
    x = 18,976.87

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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.