Home / 13,812.30-20,718.45-13,265.55

Finding the Fourth Proportional to 13,812.30, 20,718.45 and 13,265.55

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Solution

The fourth proportional to 13,812.30, 20,718.45 and 13,265.55 is: 19,898.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.30 : 20,718.45 = 13,265.55 : x
  2. Step 2: Convert to fraction form
    13,812.30/20,718.45 = 13,265.55/x
  3. Step 3: Cross multiply
    13,812.30x = 20,718.45 × 13,265.55
  4. Step 4: Simplify right side
    13,812.30x = 274,841,634.40
  5. Step 5: Solve for x
    x = 274,841,634.40/13,812.30
  6. Step 6: Final answer
    x = 19,898.33

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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.