Home / 17,900.40-26,859.78-11,981.64

Finding the Fourth Proportional to 17,900.40, 26,859.78 and 11,981.64

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Solution

The fourth proportional to 17,900.40, 26,859.78 and 11,981.64 is: 17,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,900.40 : 26,859.78 = 11,981.64 : x
  2. Step 2: Convert to fraction form
    17,900.40/26,859.78 = 11,981.64/x
  3. Step 3: Cross multiply
    17,900.40x = 26,859.78 × 11,981.64
  4. Step 4: Simplify right side
    17,900.40x = 321,824,214.44
  5. Step 5: Solve for x
    x = 321,824,214.44/17,900.40
  6. Step 6: Final answer
    x = 17,978.60

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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.