Home / 9,069.68-12,523.20-7,878.80

Finding the Fourth Proportional to 9,069.68, 12,523.20 and 7,878.80

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Solution

The fourth proportional to 9,069.68, 12,523.20 and 7,878.80 is: 10,878.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,069.68 : 12,523.20 = 7,878.80 : x
  2. Step 2: Convert to fraction form
    9,069.68/12,523.20 = 7,878.80/x
  3. Step 3: Cross multiply
    9,069.68x = 12,523.20 × 7,878.80
  4. Step 4: Simplify right side
    9,069.68x = 98,667,788.16
  5. Step 5: Solve for x
    x = 98,667,788.16/9,069.68
  6. Step 6: Final answer
    x = 10,878.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.