Home / 19,145.79-28,728.50-7,909.47

Finding the Fourth Proportional to 19,145.79, 28,728.50 and 7,909.47

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Solution

The fourth proportional to 19,145.79, 28,728.50 and 7,909.47 is: 11,868.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,145.79 : 28,728.50 = 7,909.47 : x
  2. Step 2: Convert to fraction form
    19,145.79/28,728.50 = 7,909.47/x
  3. Step 3: Cross multiply
    19,145.79x = 28,728.50 × 7,909.47
  4. Step 4: Simplify right side
    19,145.79x = 227,227,169.35
  5. Step 5: Solve for x
    x = 227,227,169.35/19,145.79
  6. Step 6: Final answer
    x = 11,868.26

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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.