Home / 19,972.05-27,555-13,258.98

Finding the Fourth Proportional to 19,972.05, 27,555 and 13,258.98

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Solution

The fourth proportional to 19,972.05, 27,555 and 13,258.98 is: 18,293.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,972.05 : 27,555 = 13,258.98 : x
  2. Step 2: Convert to fraction form
    19,972.05/27,555 = 13,258.98/x
  3. Step 3: Cross multiply
    19,972.05x = 27,555 × 13,258.98
  4. Step 4: Simplify right side
    19,972.05x = 365,351,193.90
  5. Step 5: Solve for x
    x = 365,351,193.90/19,972.05
  6. Step 6: Final answer
    x = 18,293.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.