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Finding the Fourth Proportional to 18,659.70, 25,762.14 and 12,927.42

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Solution

The fourth proportional to 18,659.70, 25,762.14 and 12,927.42 is: 17,847.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.70 : 25,762.14 = 12,927.42 : x
  2. Step 2: Convert to fraction form
    18,659.70/25,762.14 = 12,927.42/x
  3. Step 3: Cross multiply
    18,659.70x = 25,762.14 × 12,927.42
  4. Step 4: Simplify right side
    18,659.70x = 333,038,003.88
  5. Step 5: Solve for x
    x = 333,038,003.88/18,659.70
  6. Step 6: Final answer
    x = 17,847.98

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1.5x scale

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.