Home / 20,854.88-31,294.40-7,716.48

Finding the Fourth Proportional to 20,854.88, 31,294.40 and 7,716.48

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Solution

The fourth proportional to 20,854.88, 31,294.40 and 7,716.48 is: 11,579.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.88 : 31,294.40 = 7,716.48 : x
  2. Step 2: Convert to fraction form
    20,854.88/31,294.40 = 7,716.48/x
  3. Step 3: Cross multiply
    20,854.88x = 31,294.40 × 7,716.48
  4. Step 4: Simplify right side
    20,854.88x = 241,482,611.71
  5. Step 5: Solve for x
    x = 241,482,611.71/20,854.88
  6. Step 6: Final answer
    x = 11,579.19

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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.