Home / 13,079.20-19,618.80-8,682.40

Finding the Fourth Proportional to 13,079.20, 19,618.80 and 8,682.40

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Solution

The fourth proportional to 13,079.20, 19,618.80 and 8,682.40 is: 13,023.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,079.20 : 19,618.80 = 8,682.40 : x
  2. Step 2: Convert to fraction form
    13,079.20/19,618.80 = 8,682.40/x
  3. Step 3: Cross multiply
    13,079.20x = 19,618.80 × 8,682.40
  4. Step 4: Simplify right side
    13,079.20x = 170,338,269.12
  5. Step 5: Solve for x
    x = 170,338,269.12/13,079.20
  6. Step 6: Final answer
    x = 13,023.60

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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.