Home / 20,282.56-27,972.48-13,206.40

Finding the Fourth Proportional to 20,282.56, 27,972.48 and 13,206.40

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Solution

The fourth proportional to 20,282.56, 27,972.48 and 13,206.40 is: 18,213.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,282.56 : 27,972.48 = 13,206.40 : x
  2. Step 2: Convert to fraction form
    20,282.56/27,972.48 = 13,206.40/x
  3. Step 3: Cross multiply
    20,282.56x = 27,972.48 × 13,206.40
  4. Step 4: Simplify right side
    20,282.56x = 369,415,759.87
  5. Step 5: Solve for x
    x = 369,415,759.87/20,282.56
  6. Step 6: Final answer
    x = 18,213.47

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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.