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Finding the Fourth Proportional to 34,643.70, 47,808.50 and 18,728.10

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Solution

The fourth proportional to 34,643.70, 47,808.50 and 18,728.10 is: 25,844.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,643.70 : 47,808.50 = 18,728.10 : x
  2. Step 2: Convert to fraction form
    34,643.70/47,808.50 = 18,728.10/x
  3. Step 3: Cross multiply
    34,643.70x = 47,808.50 × 18,728.10
  4. Step 4: Simplify right side
    34,643.70x = 895,362,275.21
  5. Step 5: Solve for x
    x = 895,362,275.21/34,643.70
  6. Step 6: Final answer
    x = 25,844.88

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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.