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Finding the Fourth Proportional to 6,666.34, 9,987.65 and 3,890.67

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Solution

The fourth proportional to 6,666.34, 9,987.65 and 3,890.67 is: 5,829.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,666.34 : 9,987.65 = 3,890.67 : x
  2. Step 2: Convert to fraction form
    6,666.34/9,987.65 = 3,890.67/x
  3. Step 3: Cross multiply
    6,666.34x = 9,987.65 × 3,890.67
  4. Step 4: Simplify right side
    6,666.34x = 38,858,650.23
  5. Step 5: Solve for x
    x = 38,858,650.23/6,666.34
  6. Step 6: Final answer
    x = 5,829.09

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1.5x scale

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.