Home / 13,173.21-19,665.91-12,711.78

Finding the Fourth Proportional to 13,173.21, 19,665.91 and 12,711.78

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Solution

The fourth proportional to 13,173.21, 19,665.91 and 12,711.78 is: 18,977.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,173.21 : 19,665.91 = 12,711.78 : x
  2. Step 2: Convert to fraction form
    13,173.21/19,665.91 = 12,711.78/x
  3. Step 3: Cross multiply
    13,173.21x = 19,665.91 × 12,711.78
  4. Step 4: Simplify right side
    13,173.21x = 249,988,737.31
  5. Step 5: Solve for x
    x = 249,988,737.31/13,173.21
  6. Step 6: Final answer
    x = 18,977.06

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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.