Home / 18,686.40-25,771.68-13,981.92

Finding the Fourth Proportional to 18,686.40, 25,771.68 and 13,981.92

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Solution

The fourth proportional to 18,686.40, 25,771.68 and 13,981.92 is: 19,283.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.40 : 25,771.68 = 13,981.92 : x
  2. Step 2: Convert to fraction form
    18,686.40/25,771.68 = 13,981.92/x
  3. Step 3: Cross multiply
    18,686.40x = 25,771.68 × 13,981.92
  4. Step 4: Simplify right side
    18,686.40x = 360,337,568.03
  5. Step 5: Solve for x
    x = 360,337,568.03/18,686.40
  6. Step 6: Final answer
    x = 19,283.41

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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.