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Finding the Fourth Proportional to 7,089.55, 9,783.39 and 3,945.67

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Solution

The fourth proportional to 7,089.55, 9,783.39 and 3,945.67 is: 5,444.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,089.55 : 9,783.39 = 3,945.67 : x
  2. Step 2: Convert to fraction form
    7,089.55/9,783.39 = 3,945.67/x
  3. Step 3: Cross multiply
    7,089.55x = 9,783.39 × 3,945.67
  4. Step 4: Simplify right side
    7,089.55x = 38,602,028.42
  5. Step 5: Solve for x
    x = 38,602,028.42/7,089.55
  6. Step 6: Final answer
    x = 5,444.92

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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.