Home / 9,412.65-12,989.26-5,220.90

Finding the Fourth Proportional to 9,412.65, 12,989.26 and 5,220.90

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Solution

The fourth proportional to 9,412.65, 12,989.26 and 5,220.90 is: 7,204.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,412.65 : 12,989.26 = 5,220.90 : x
  2. Step 2: Convert to fraction form
    9,412.65/12,989.26 = 5,220.90/x
  3. Step 3: Cross multiply
    9,412.65x = 12,989.26 × 5,220.90
  4. Step 4: Simplify right side
    9,412.65x = 67,815,627.53
  5. Step 5: Solve for x
    x = 67,815,627.53/9,412.65
  6. Step 6: Final answer
    x = 7,204.73

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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.