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Finding the Fourth Proportional to 19,199.84, 28,800.21 and 5,159.88

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Solution

The fourth proportional to 19,199.84, 28,800.21 and 5,159.88 is: 7,739.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,199.84 : 28,800.21 = 5,159.88 : x
  2. Step 2: Convert to fraction form
    19,199.84/28,800.21 = 5,159.88/x
  3. Step 3: Cross multiply
    19,199.84x = 28,800.21 × 5,159.88
  4. Step 4: Simplify right side
    19,199.84x = 148,605,627.57
  5. Step 5: Solve for x
    x = 148,605,627.57/19,199.84
  6. Step 6: Final answer
    x = 7,739.94

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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.