Home / 7,860.60-11,790.12-2,666.40

Finding the Fourth Proportional to 7,860.60, 11,790.12 and 2,666.40

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Solution

The fourth proportional to 7,860.60, 11,790.12 and 2,666.40 is: 3,999.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,860.60 : 11,790.12 = 2,666.40 : x
  2. Step 2: Convert to fraction form
    7,860.60/11,790.12 = 2,666.40/x
  3. Step 3: Cross multiply
    7,860.60x = 11,790.12 × 2,666.40
  4. Step 4: Simplify right side
    7,860.60x = 31,437,175.97
  5. Step 5: Solve for x
    x = 31,437,175.97/7,860.60
  6. Step 6: Final answer
    x = 3,999.34

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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.