Home / 12,965.80-19,416.30-8,559.40

Finding the Fourth Proportional to 12,965.80, 19,416.30 and 8,559.40

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Solution

The fourth proportional to 12,965.80, 19,416.30 and 8,559.40 is: 12,817.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,965.80 : 19,416.30 = 8,559.40 : x
  2. Step 2: Convert to fraction form
    12,965.80/19,416.30 = 8,559.40/x
  3. Step 3: Cross multiply
    12,965.80x = 19,416.30 × 8,559.40
  4. Step 4: Simplify right side
    12,965.80x = 166,191,878.22
  5. Step 5: Solve for x
    x = 166,191,878.22/12,965.80
  6. Step 6: Final answer
    x = 12,817.71

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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.