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Finding the Fourth Proportional to 7,128.99, 10,693.48 and 1,934.86

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Solution

The fourth proportional to 7,128.99, 10,693.48 and 1,934.86 is: 2,902.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.99 : 10,693.48 = 1,934.86 : x
  2. Step 2: Convert to fraction form
    7,128.99/10,693.48 = 1,934.86/x
  3. Step 3: Cross multiply
    7,128.99x = 10,693.48 × 1,934.86
  4. Step 4: Simplify right side
    7,128.99x = 20,690,386.71
  5. Step 5: Solve for x
    x = 20,690,386.71/7,128.99
  6. Step 6: Final answer
    x = 2,902.29

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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.