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Finding the Fourth Proportional to 18,719.88, 28,071.52 and 7,024.84

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Solution

The fourth proportional to 18,719.88, 28,071.52 and 7,024.84 is: 10,534.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.88 : 28,071.52 = 7,024.84 : x
  2. Step 2: Convert to fraction form
    18,719.88/28,071.52 = 7,024.84/x
  3. Step 3: Cross multiply
    18,719.88x = 28,071.52 × 7,024.84
  4. Step 4: Simplify right side
    18,719.88x = 197,197,936.56
  5. Step 5: Solve for x
    x = 197,197,936.56/18,719.88
  6. Step 6: Final answer
    x = 10,534.15

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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.