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Finding the Fourth Proportional to 18,703.99, 28,031.73 and 7,597.78

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Solution

The fourth proportional to 18,703.99, 28,031.73 and 7,597.78 is: 11,386.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.99 : 28,031.73 = 7,597.78 : x
  2. Step 2: Convert to fraction form
    18,703.99/28,031.73 = 7,597.78/x
  3. Step 3: Cross multiply
    18,703.99x = 28,031.73 × 7,597.78
  4. Step 4: Simplify right side
    18,703.99x = 212,978,917.56
  5. Step 5: Solve for x
    x = 212,978,917.56/18,703.99
  6. Step 6: Final answer
    x = 11,386.82

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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.