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Finding the Fourth Proportional to 6,709.50, 9,259.11 and 3,915

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Solution

The fourth proportional to 6,709.50, 9,259.11 and 3,915 is: 5,402.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,709.50 : 9,259.11 = 3,915 : x
  2. Step 2: Convert to fraction form
    6,709.50/9,259.11 = 3,915/x
  3. Step 3: Cross multiply
    6,709.50x = 9,259.11 × 3,915
  4. Step 4: Simplify right side
    6,709.50x = 36,249,415.65
  5. Step 5: Solve for x
    x = 36,249,415.65/6,709.50
  6. Step 6: Final answer
    x = 5,402.70

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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.