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Finding the Fourth Proportional to 14,421.78, 19,902.03 and 7,797.78

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Solution

The fourth proportional to 14,421.78, 19,902.03 and 7,797.78 is: 10,760.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,421.78 : 19,902.03 = 7,797.78 : x
  2. Step 2: Convert to fraction form
    14,421.78/19,902.03 = 7,797.78/x
  3. Step 3: Cross multiply
    14,421.78x = 19,902.03 × 7,797.78
  4. Step 4: Simplify right side
    14,421.78x = 155,191,651.49
  5. Step 5: Solve for x
    x = 155,191,651.49/14,421.78
  6. Step 6: Final answer
    x = 10,760.92

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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.