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Finding the Fourth Proportional to 7,089.50, 9,783.51 and 3,945.89

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Solution

The fourth proportional to 7,089.50, 9,783.51 and 3,945.89 is: 5,445.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,089.50 : 9,783.51 = 3,945.89 : x
  2. Step 2: Convert to fraction form
    7,089.50/9,783.51 = 3,945.89/x
  3. Step 3: Cross multiply
    7,089.50x = 9,783.51 × 3,945.89
  4. Step 4: Simplify right side
    7,089.50x = 38,604,654.27
  5. Step 5: Solve for x
    x = 38,604,654.27/7,089.50
  6. Step 6: Final answer
    x = 5,445.33

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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.