Home / 7,931.68-11,897.81-2,666.87

Finding the Fourth Proportional to 7,931.68, 11,897.81 and 2,666.87

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Solution

The fourth proportional to 7,931.68, 11,897.81 and 2,666.87 is: 4,000.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,931.68 : 11,897.81 = 2,666.87 : x
  2. Step 2: Convert to fraction form
    7,931.68/11,897.81 = 2,666.87/x
  3. Step 3: Cross multiply
    7,931.68x = 11,897.81 × 2,666.87
  4. Step 4: Simplify right side
    7,931.68x = 31,729,912.55
  5. Step 5: Solve for x
    x = 31,729,912.55/7,931.68
  6. Step 6: Final answer
    x = 4,000.40

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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.