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Finding the Fourth Proportional to 19,185.76, 28,781.07 and 5,334.76

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Solution

The fourth proportional to 19,185.76, 28,781.07 and 5,334.76 is: 8,002.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,185.76 : 28,781.07 = 5,334.76 : x
  2. Step 2: Convert to fraction form
    19,185.76/28,781.07 = 5,334.76/x
  3. Step 3: Cross multiply
    19,185.76x = 28,781.07 × 5,334.76
  4. Step 4: Simplify right side
    19,185.76x = 153,540,100.99
  5. Step 5: Solve for x
    x = 153,540,100.99/19,185.76
  6. Step 6: Final answer
    x = 8,002.82

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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.